What's the difference between Chainflip vs Thorchain?

I've been looking at Chainflip and THORChain for cross chain swaps and I'm trying to understand the actual differences between them.

They seem pretty similar and far I saw, ThorSwap has Chainflip integrated, but with a fee on the top of it, So I'm wondering what is worth using, knowing thorswap adds a fee on chainflip's own routes, and chainflip seems ok but is truly expensive, if i'm right, why is thorswap even so famous for? If they just aggregate other routes with a fee on it? It makes no sense