If the part says GDDR6 on it (non refreshed are GDDR5, the GDDR6 and Super line only currently available on Intel Processors in laptops), then it's the refresh part, as for power, manufacturers have always been allowed to push 115w through their Standard/MaxP parts, only the MaxQ parts are 80-90w parts.
As for the performance of the 2060 to the 2070MaxQ, there isn't an awful lot in it, but like the Car guys say "there's no replacement for displacement" and in this case displacement is Cuda cores, where the 2060 is 1920 and the 2070 MaxQ is 2304.... a mild overclock will have more effect on the 2070S than on the 2060.
I know not a 'definitive' answer, but you get the idea
No probs at all, remember the 2070 having more cuda cores means the DLSS will work better too, just thought I'd add that.
Fair enough, get the best you can afford, the golden rule in tech 😉
I'm too blind nowadays to use 15.6 lol, but yeah feel for you.
Post the spec you're looking at perhaps some of the guys can help you eek out what you need. Also is you wanna save a few bob, buy the windows license elsewhere and take it off your build, usually pick it up sub £50 and save yourself £60 or so on your build.
Could always call PCS see if they will do one without the NVME in it