I posted this topic in the new tablet scene forum, but was told I would find out more information posting on ITT

I have been itching to purchase the N810 ever since I first saw it. I started to mess around with linux ( installed ubuntu on an old g4) I was finally going to pull the trigger on an N810 last week, that was until my brother came home with an ipod touch. I was messing around with it and installed the free vnc app. It ran very slow, but overall it was not too bad. My question is, is there any real difference between Vnc viewer and Rdesktop? I have a hunch that there are major differences in these two n810 applications. Is there anyway special way to set up my n810 to view my mac desktop somewhat quickly?