Hehe, what a weird comparison. Accord & Camry both can not compare to Audi at all. Comfort wise, passat & audi is about there, you can't feel too significant different. Performance wise, of course the 2.0 passat way better than the A4 1.8, sorry to say I am not impressed by the A4 1.8. Passat truly a value buy when compared to 2.0 Merce, BMW & Audi. TS, i am very much like you doing some info search on the next purchase. However, Passat & A4 1.8 both not in my consideration list. I've shortlisted C250 & IS250. A4 2.0 on the other hand is great, but the price just too expensive imo. I like IS250 becos of its interior and it is not that much otr too. Anyway, to answer your question,  passat should be the one to go for (resell value could be worst than audi though). But most importantly, you must buy a car you have the feel and like the most. Otherwise, you will keep regretting  even though if you are driving the best car in the world but u just don't like it.

where did u test drive the car? glenmarie's a4 is not available for test drive.