Upload & Sell: On
...Were you both saving in the same format?
...I also looked at my friend's Nikon D700 (I think that is the model) who was also shooting in RAW as I do and she had nearly no noise with similar settings. Forgot to mention the T2i was shooting in JPEG.
As others have said, that's the answer to your question; saving the files in different modes makes all the differance.
Saving in raw format is a good idea, in my opinion, if you don't need to immediately send your shots off to the news desk or something like that, because it allows you to process the images exactly the way you want to with all the original data untouched by the camera's processor (more-or-less).
When saving the files as JPEGs, a lot of work is done on the files before writing it to the card: noise reduction, color "correction," data compression, etc., and you have little control over the process. The images may look better straight out of the camera, but well processed raw images will almost always look better in the long run.
As for the D700, that full-frame / large-sensel camera is renowned for its light-gathering ability. I know a wedding photographer who paid extra for two sets of lenses just so he could run a 5D Mark II for formals, and a D700 during the ceremony and the reception. (He started with Canon, and added the D700 after a while. If he were just starting out, I'd have suggested a D700/D800 combo, but that's fodder for another thread.)