There's a large difference, at least compared to Uniswap V3. Read the features to see what the new version has that SushiSwap doesn't.

For the record, SushiSwap is a fork of Uniswap, so the initial features of SushiSwap was all that Uniswap had.

By now, they mainly differ in that SushiSwaps governance seems to still go forward while Uniswap has been stuck since the requirement for doing proposals is too high.