I want to underline that I’m strictly looking for a comparison in the two when it comes to post processing RAW images from EOS cameras.
Have you used both the DPP 2.2 and Photoshop CS2 to post process RAW images from your EOS digital camera? Is there really no comparison to be made, meaning does PS CS2 take the title hands down? I was thinking that DPP 2.2 could have some kind of advantage being designed for the EOS digital cameras.
At the moment I’ve got DPP 2.2 and Photoshop CS. I have thought about updating my PS to CS2, but I’m not sure if it’s a good enough investment. Maybe it will be more wise to wait for a while, and then update CS to CS3 whenever that will be out (usually one is able to update two steps up, for instance the CS2 update version can be used on Photoshop 7). I do have the option to save files in DPP to TIFF, and then open them I Photoshop CS.
Comments? Opinions?
Ps. I did see that this subject has been discussed before. I’m just looking for a more narrowed down view.
I'll wait for CS3 then, and maybe also start looking into Adobe Lightroom.

