You should get the same quality...
photo as a 10D with the Drebel, it uses the same sensor. I noticed when I first got my 10D I was a little dissappointed with the photos, they seemed to lack the POP of my G2 or EOS 3 (velvia). I have come to embrace the look of the 10D photograph and have decided that the POP was created in camera on my G2. I have started seeing Velvia photos as garish in some instances, especially when put up side by side with the same photo taken with a 10D. I like the subtler look of the 10D pictures and when I see G2, Sony DSC-V1, or Velvia pictures, they look oversaturated to me.
Maybe that is what you are seeing with your Drebel. Some post processing can punch up the Drebel's shots, and that is one of the really nice things about Canon's DSLRs and RAW.