I lived for fifteen years in Phoenix.
The Mexican food here is awful. Chipotle is the closest I've found to what is traditional in the Valley. One of the biggest differences is the chips at restaurants here are heavy and greasy. Tostitos are better. Lousy chips and salsa at the stores too. There are lots of Mexican people here and lots of Mexican restaurants but the food is very different than Arizona's. It is also different than Tex Mex or California Mex. I eat Mexican almost every day when I am in Arizona which isn't often enough.
I also find the Pizza to be different. I eat Pizza in Phoenix as well. I also eat at Miracle Mile and Einsteins as much as possible because Kosher delis and good bagels are lacking here as well. I was a West Valley girl so maybe your taste is different.
A lot of the chain restaurants aren't here or just got here. Some of them aren't the same to me. Marie Callendar's here is awful for example but the one I tried outside of Seattle was exactly the same.
The Portland metro area is significantly smaller than the Phoenix metro area. The commutes are shorter. Home Depots are closer.

Driving speeds are slower, the posted speed limits on the highways are slower. Not every neighborhood has sidewalks.
Portland is very Liberal, Green, food, dog, bike and nature friendly. Loads of farmer's markets, lots of local produce in grocery stores and farm stands as well. You'll look at apples a whole new way to have so many varieties and citrus is getting a lot better. Lots of Asian food, seafood. Meat prices are higher in the grocery stores.
There are a lot of music clubs downtown, a lot of bars and galleries. If you like microbrewed beer, coffee or tea you will think you are in heaven.
When I first moved here I was shocked by the lack of iced tea at restaurants, how many nude dancing bars there were and how few bars actually served hard liquor. The ones called Taverns only serve beer and wine. You can't buy booze in the grocery stores either, only at state controlled liquor stores and it is very expensive compared to Arizona. No drive thru liquor here!