Plain Wireless ‘Qi’ charging doesn’t give you the magnet feature (although there are 3rd party accessories & chargers which do now). Not sure how they compare. Someone else can jump in here.
Yeah you could. My overnight charge stand (non-magnetic, hence why the stand is good idea, again) Is only 5-7.5W max, so it just slowly tops it up overnight. I also have the 80% max battery charge feature (not sure if iPhone 13 has this) activated to help preserve the battery & this has suited me as 80% is enough for my day (I have access to regular daily charging).
For 3rd party wireless or cable?
Wireless max for iPhones is 25W, so it’s pointless going for anything more than that.
Wired, it depends on how much battery you’re using through the day. My 20W Belkin USB-C port chargers the phone to 80% fast enough. It’s pretty quick actually. I think stick with 30W or below per USB-C PD port (PD = ‘Power Delivery’ which Apple supports for fast charging - make sure your brick has this fast charging format or else the quoted Wattages may only work with Android phones).
Again, I’d stick with Apple’s puck.
But if you want a stand to put the puck in, go for one that has adjustable angles, is sturdy & has grip feet. There are plenty on AliExpress. Here’s mine…
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Not the best quality (on the screw which connects the arm to the base, I’ll fix it eventually), but it has two adjustable points to make it handy for viewing at different angles.