I’ve run both…Umbrel is more friendly to tinkering, easier to access for clearnet , and has a lot of apps. Start9 is a solid Bitcoin machine and clearnet access is coming in a future update. Both are good setups in my opinion. It all boils down to what you want to do. Clearnet access really isn’t that big a deal unless you’re trying to run btcpayserver online store or something similar. Can’t go wrong either way. Best choice is just to do it. Congratulations.