Both are soft fork proposals but that's the only point of similarity.

CTV is a way to do covenants (lock up coins in more interesting ways). This can be useful for some layer two ideas, and vaults among other things.

CISA is basically a optimization on use of block space. It'd mean batch payments and coinjoins become smaller and thus cheaper on chain.

https://bitcoinops.org is a good resource to learn more but it's also very technical.