Hmm... It looks like the bundles aren't identical across platforms. itch has 15 things included, DTRPG has 17.
Aberrant Allies: Aberrant Codex 5e, Species Archive: The Belaran (Pathfinder 1e), Circles of Power, Lonely Timbers, Sad Robot, and Watch the World Die are in the DTRPG bundle but not itch.
No Love's Land, Orizuru: a half-formed thing, Loveland, and Across the Waves to You are in the itch bundle but not DTRPG.