Warum liefern "composer outdated" und "drush ups" so unterschiedliche Ergebnisse?

Warum liefern "composer outdated" und "drush ups" so unterschiedliche Ergebnisse, dass mal Updates gezeigt werden mal nicht?

# composer outdated

# composer outdated

phenx/php-font-lib           0.5     0.5.1   A library to read, parse, export and make subsets of different types of font files.
symfony-cmf/routing          1.4.1   2.1.0   Extends the Symfony2 routing component for dynamic routes and chaining several routers
symfony/console              v3.4.32 v4.3.5  Symfony Console Component
symfony/dependency-injection v3.4.32 v4.3.5  Symfony DependencyInjection Component
symfony/event-dispatcher     v3.4.32 v4.3.5  Symfony EventDispatcher Component
symfony/http-foundation      v3.4.32 v4.3.5  Symfony HttpFoundation Component
symfony/http-kernel          v3.4.32 v4.3.5  Symfony HttpKernel Component
symfony/process              v3.4.32 v4.3.5  Symfony Process Component
symfony/routing              v3.4.32 v4.3.5  Symfony Routing Component
symfony/serializer           v3.4.32 v4.3.5  Symfony Serializer Component
symfony/translation          v3.4.32 v4.3.5  Symfony Translation Component
symfony/validator            v3.4.32 v4.3.5  Symfony Validator Component
symfony/yaml                 v3.4.32 v4.3.5  Symfony Yaml Component
twig/twig                    v1.42.3 v2.12.0 Twig, the flexible, fast, and secure template language for PHP
typo3/phar-stream-wrapper    v2.1.2  v3.1.2  Interceptors for PHP's native phar:// stream handling
zendframework/zend-diactoros 1.8.7   2.1.5   PSR HTTP Message implementations

# drush ups

# drush ups
Error while trying to find the common path for enabled extensions of project ctools. Extensions are: ctools,  [error]
ctools_block, ctools_entity_mask, ctools_views.
Daten über verfügbare Aktualisierungen werden geprüft ...                                                  [ok]
Checking available update data for Drupal.                                                                    [ok]
Checking available update data for CAPTCHA (captcha).                                                         [ok]
Checking available update data for Code Filter (codefilter).                                                  [ok]
Checking available update data for AddToAny (addtoany).                                                       [ok]
Checking available update data for Admin Toolbar (admin_toolbar).                                             [ok]
Checking available update data for CKEditor CodeSnippet (codesnippet).                                        [ok]
Checking available update data for Colorbox (colorbox).                                                       [ok]
Checking available update data for Entity Browser (entity_browser).                                           [ok]
Checking available update data for Entity Reference Revisions (entity_reference_revisions).                   [ok]
Checking available update data for Google Analytics (google_analytics).                                       [ok]
Checking available update data for H5P (h5p).                                                                 [ok]
Checking available update data for Honeypot (honeypot).                                                       [ok]
Checking available update data for Like & Dislike (like_and_dislike).                                         [ok]
Checking available update data for Linkit (linkit).                                                           [ok]
Checking available update data for Metatag (metatag).                                                         [ok]
Checking available update data for Multiple Registration (multiple_registration).                             [ok]
Checking available update data for Panels (panels).                                                           [ok]
Checking available update data for Paragraphs (paragraphs).                                                   [ok]
Checking available update data for Permissions by Term (permissions_by_term).                                 [ok]
Checking available update data for Redirect (redirect).                                                       [ok]
Checking available update data for Search API (search_api).                                                   [ok]
Checking available update data for ShareThis (sharethis).                                                     [ok]
Checking available update data for Token (token).                                                             [ok]
Checking available update data for Video Embed Field (video_embed_field).                                     [ok]
Checking available update data for View Unpublished (view_unpublished).                                       [ok]
Checking available update data for Voting API (votingapi).                                                    [ok]
Checking available update data for Pathauto (pathauto).                                                       [ok]
Checking available update data for reCAPTCHA (recaptcha).                                                     [ok]
Checking available update data for TagClouds (tagclouds).                                                     [ok]
Checking available update data for Bootstrap (bootstrap).                                                     [ok]
 Name                   Installed Version  Proposed version  Message
 CAPTCHA (captcha)      8.x-1.0-beta1      8.x-1.0-beta3     Aktualisierung verfügbar
 Token (token)          8.x-1.1            8.x-1.5           Aktualisierung verfügbar
 Pathauto (pathauto)    8.x-1.2            8.x-1.5           Aktualisierung verfügbar
 reCAPTCHA (recaptcha)  8.x-2.3            8.x-2.4           Aktualisierung verfügbar
 TagClouds (tagclouds)  8.x-1.x-dev        8.x-1.0           Aktualisierung verfügbar