Even setting aside the drastic inflation of the price, the downsides are also huge. If you plan to switch to a mac, particularly one with a new ARM chip, be prepared to see no end of weird random glitches with a lot of software, including Defold. Also you will be very limited in the software you can use in general. If you want to play games, forget it (switching to Linux would almost be less bad in that regard). If you are used to using a lot of hotkeys, be prepared to completely retrain yourself, because despite some system options to change them, you can’t consistently revert apple’s swapping of the modifier keys, and some programs have very different default keybindings on mac. Lots of other little things are different too, and there are less options for customization available.
Don’t pay attention to any claims of better reliability on mac, I’ve had to reinstall the OS due to an official system update bricking it before, and seen plenty of crashes and other issues just like on windows. No, macs aren’t magically better for “media editing” or whatever—that may have been true 30 years ago when apple cooperated directly with adobe for photoshop and so on, but not anymore. If you are wondering about general CPU performance, you should be able to look up performance benchmark data (as long as it’s not too new).
I can’t say much about battery life, but if you’re considering a mac mini then presumably that’s irrelevant. On the plus side, if you plan to get a mac, the mini is the way to go—the price isn’t too inflated for the hardware.
Look through the hype.
[Edit:] Ah, and be careful with filesystem formats. If you use any external drives, make sure they don’t get formatted to Apple’s custom format that’s a pain for any other system to use.