There is no comparison between Parallels and Boot Camp as Boot Camp always delivers a far better experience. Why over resource your Mac with running the macOS, then Parallels, then Windows, then the game. Cut out the middle man and just run Windows. Plus by recommending Parallels you're telling people to not only buy a copy of Windows but also spend another £60+ on 3rd party software that just isn't needed. The space you're allocating to Parallels, whilst dynamic, is still eating into the flash storage on the Mac which, as we all know, isn't upgradeable after-market.
Parallels has a place and is a great piece of software for low end usage (I use it for Sims4Studio and used to use it for initially setting up CAW worlds before properly building and decorating them) but no way can it be recommended for regular, intense gaming. I hate to think that someone might buy it on recommendation only to be severely disappointed if they like all their graphics to be on high settings and they have all EPs and SPs. No need to buy a PC if you want a better gaming experience, just use Boot Camp instead of Parallels :)
