Your short list is identical to what my short list was earlier this year (Tiffin Bus and Phaeton, Winnies Vectra and Tour). We ended up with a Tiffin Allegro Bus 40' QSP. To be fair, both of the Winnies are good coaches and have some nice features that I like (EMS system being the biggie that Tiffin did not have). The Tiffins (specially the Bus) drive like a dream, much better than the Winnies and the reputation Tiffin has in after the sale support and service steered the boat their way and we are very pleased with the coach and the service so far. The Phaeton is a great value, however we picked the Bus because we wanted a HydroHot heating system and that is not available in the Phaeton. Now, the Bus also comes in a Spartan chassis which makes it even more attractive to most people and you can get it with IFS (get it if you can) in both Spartan and Freightliner.
Whatever you end up doing, enjoy!