32Gb will be no faster than 16GB unless you are getting close to using 16GB, which it is unlikely that you are.
As an example of price differences, 16GB of 3200 is £91.
https://www.scan.co.uk/products/16g...-(3200)-non-ecc-unbuffered-cas-16-18-18-36-xm
16GB of 4333 is £325
https://www.scan.co.uk/products/16g...3-non-ecc-unbuffered-cas-19-26-26-46-xmp-20-1
Personally the £235 difference is not worth it, yes it'll give you maybe an extra 10%, but when you are only playing at 60fps you simply don't need it, a mid range CPU with mid range memory will do that. Running competitively at 144+ might require really careful component selection, 60fps does't need it.
Now if you are looking to upgrade to a better screen in the next 2 years, then it might be worth choosing higher frequency capable components now, but intel and AMD are so close to each other that just picking nearer the top of the range is fine. We're seeing a lot people thinking that they must have a 9900k for gaming, where the simple truth is you don't, it's an enthusiast part, you'll know if you want it, as it will in part be for bragging rights as well as productivity.