Might depend on what city your team is in. Simmons being on a max is a bit scary, but it does lock him down in a market where he might not sign otherwise. And I do think overall his ceiling remains higher.
I think it's a strong case in favor of the Kings. No, they're not one of the top 3 California teams he prefers, but it's still California. I feel like he'd be OK.
If you're the Lakers, Clippers, Heat, Warriors, etc. you'd probably rather have the cap room benefits that come with a guy like Maxey since you can more easily fill the cap room with studs. Admittedly a lot of those teams won't have cap room either way - but the luxury tax is no joke once you hit certain thresholds either.