Between Radicle, Tangled and Grasp, Radicle feels the coolest to me, emotionally, local first, p2p, for whatever reason it feels kind of nostalgic.
Grasp is actually pretty cool too, built on nostr, which is maybe a stronger platform in the end? I dont really know enough about it. Stronger as in, you're maybe opening up more interoperablity by putting your stuff on a "anything network" vs Radicles "p2p git data network".
To be honest they're all cool ideas, Tangled feels some how corporate though.
Graps seems neat in the way it forces you to sign your commits (which should really be standard practice) but I think Github itself has proven that interoperability is not that important.