I don't use either, but i would suggest you to check these as part of your research.
1. Check whether their withdraw fee is only network fee. One way to find out is by comparing it with TX fee recommendation on
https://mempool.space/.
2. Check Bitcoin price/buy rate with other exchange. You can use
https://www.coingecko.com/en/coins/bitcoin as comparison.
If you plan to enable auto-withdraw with minimum amount, take note you'll have lots UTXO. It means you'll pay higher TX fee if you plan to send big amount of Bitcoin.
Thanks for the tip about the UTXO. I didn't think about that, at all. Definitely made some significant changes to my plans. I'm going to try swan out, but will likely do a monthly buy instead of hourly. I will update thread if I learn anything else useful.