Even for a bunch of tabs and programs opened, you shouldn't run into problems with 32GB. Except if you really need it of course (you would probably know this already though, if it was limiting you).
Do you intend to game a bit on it? Because if so, I would recommend the CL40 RAM. If not, you probably are fine with CL46 because it is cheaper.
If you aren't sure about the capacity you could look up guides for your programs and use cases.