If you're comparing the new Passats, I think they come with a lower output version of the 2.0T. Its not quite the same (at least in output numbers) as the GTI. So they're quoting 174hp, and 184tq. I will say I had a rental passat with the 1.8T last year, and it moved fine and achieved pretty good MPG. But not very powerful...
The VR6 Passat would probably be my choice, of course its a little pricier. It also gets a lower fuel economy rating. To your point about servicing... yes the 2.0T is pretty easy to change oil on. Filter on top, and I just use a fluid extractor. I did notice VW claims the 2.0 in the passat has a 6.8qt capacity... So that might be a pain/extra expense during changes. The 2.0 in my GTI only needs 6.
Check out this video review of one