Here in Australia, we have both Subway and Quiznos in sydney.i have never had a sub at quiznos as they are priced quite expensive compared to subway. Generally i find that subway sandwiches are ok. I have had friends who tried quiznos and they have felt that quiznos sandwiches are sometimes smaller than subways so in terms of vaue, here in aussie, we do have an opinion that subway is better.
Im not sure about the comments made in the posts so far but it seems that quality of the sandwiches are quite variable in the USA. Subs are healthy depending on what you order to put in them. If you order one with lots of mustard or fatty sauces and meats, obviously its not very healthy?