I will say this, you should be seeing a difference, a big difference in
the image quality between files produced by your G2 and your 600D. If
not, the problem might lie in some peculiarity in your photographic
technique, but most importantly I have a feeling your hardline choice of
OS is your real problem, and it is distracting you from paying attention
to improving your photography.


There is much more that goes into the selection of an OS, at least for
most of us, than the impact of one application.

I have proudly used Linux exclusively for over a decade - I've yet to
find anything important to me that I can't do with it and in the process,
I've saved thousands of dollars.