the resistance pressure is the same no matter if you have a plastic key or a skim coating of texture on the keys. this texture is so thin that you could in theory scrape it off with your fingernail if you dug in. we aren't talking about a hunk of rubber or padded keys here. the only keyboards i've seen that i would consider soft are those cheap roll up ones although they are absolutely horrendous to type on, let alone game on.
i don't own a razer keyboard, i own the mouse and i've touched the keyboard in store.
from my experience, cheap keyboards such as your run of the mill dell and other rebrands such as your compaq keyboard as well as cheap foreign knockoffs (you know the ones that get you a mouse and a keyboard for under $10) tend to be rather stiff.
the only keyboard i have used that used rubber dome switches that was easier to press than most was my old logitech keyboard that came with my mx1000 mouse. it had 3/4 height keys without a whole lot of resistance behind them. in fact it is the reason why i put it in storage: i prefer stiffer keys. that said, the logitech G series might be the same but you would have to check them out.
on the mechanical switch side of things on another forum people have recommended keyboards using the following switches as easy to press, in order of least to greater resistances: 30g realforce, cherry MX red, cherry MX brown. i've always preferred the higher resistance ones but i can tell you that the feel is much better than rubber domes. since you want a very light touch on the keys i'll quote what was said about the realforce there: "That all 30g Realforce is just taking it a bit too far. That's just a a personal opinion though, and someone with girlie hands might find the ultra low force enjoyable."
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it all depends on how hardcore you wanted to take this. a rubber dome keyboard might be easy enough to press for you but rubber dome keyboards are hit and miss when it comes to pressure. they dont state a number for force required. mechanical switch keyboards state which switches they use (or you can find out by searching) and those switches all have specific activation forces. this means that finding a low force keyboard is as simple as matching up the resistance you want with a keyboard that uses the switches. if you are unsure of how much pressure to use then (albiet a very bad way) to test would be to use a small scale that measures grams and see how much pressure it takes to be uncomfortable to press down with and stay under that. if even the lightest press (under 25-30g) hurts then there isnt much even a low activation force keyboard can do.
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on a side note, switching mouse and keyboard hands would solve the issue. however, this would be a huge learning curve.