Side by side
Raindrop wins on breadth
Raindrop's public documentation describes search across bookmarks, collections, tags, highlights, and annotations, with apps and capture options built for a general web library.
Talon wins on specialization
Talon preserves author, quoted-post, media, and thread context, lets you organize bookmarks into local folders, and answers questions with direct citations back to that private corpus.
Choose the center of gravity
If the browser is your capture surface, start with Raindrop. If the X timeline is the source you repeatedly mine for work, start with Talon.
Questions
Can Raindrop search bookmark content?
Its search documentation describes multiple search modes and notes that some content and meaning search capabilities depend on plan and indexing conditions.
Can Talon save arbitrary web pages?
Talon is currently designed around X bookmarks and the articles and media they reference, not universal web clipping.