Personally if i had to choose between those, i would choose shape (that's what i voted for).
I understand the opinions the others forum users gave, but from my point of view if you have a big mouse and\or overwheighted, that can't fit your hand but a great sensor (well this a caotic scenario
) , even if you can adjust your grip, i think you won't be to get full performance of the mouse itself (Also it would give you hand pain\cramps, etc.).
For example, at my job i use an old ball mouse (believe it or not) and it's small, kind of heavy (if we compare to a optical one), almost the same size as logitech G100\100s i think, and i love it to do my work (excell, word, e-mail, etc.), i can kind of palm it but i love to claw it.
But when i get home and want to play, for some reason my hand wants to palm the mouse (i'm using a G400).
I could never play with the same grip i work (claw vs palm). (well haven't tried really to play with claw grip, except when i tried xai, but even then my hand tend to palm it...)
I think if you have a mouse that fits you "like a glove", or at least make you feel comfortable, with a medium sensor, i think later on you can inprove your skills with it and "forget" you have a "mediocre" sensor (of course you would have to adjust to the mouse, ex. max tracking, LOD etc.) (but isnt' what we already do?... I know i sound a bit confusing.. but you get my POV. Edited by Snakesoul - 4/2/13 at 3:22pm