A potentially better layer 2?

So Iv been using the hashi bridge to bring my tokens and eth over to the Sora network and then I do all my trades on polkaswap dex (it’s like a uniswap clone I think it looks pretty similar) then when I’m going to use the tokens utility (like using Slp for axie infinity) I just send the tokens over the hashi bridge to my metamask and use them from there.

Now for my question, what are the benefits of using an ethereum layer 2 solution like polygon (which to my understanding is not connected to ethereum blockchain in anyway and uses bridges like hashi) over a substrate based chain like Sora network?