Astudio is essentially like a hotel room, with the addition of a "kitchenette" with a small(dorm size)fridge, a coffemaker, a microwave, and a toaster. A 1BR is like a 1 BR condo, with a fully equipped kitchen,all the cookware/servingware,dishwasher,stove,microwave,coffemaker,
toaster etc, a livingroom with a couch(queen size sleeper),loveseat,easy cahir, a dining table, a MBR with a king size bed, jacuzzi tub,walk-in shower,washer/dryer. For a longer trip, the convenience of having a washer/dryer in the room can't be beat! You can pack less, and do a quick load of wash in the evening while you're hanging out. There is no comparison to the way you can live in a studio vs. a 1BR. The 1BR is far superior, but, if you are not a person who stays in the room a lot, a studio certainly isn't too shabby either! With the addition of the kitchenette, it still gives you more than a regualr hotel room would.
In general, if we are going to be there for 5 or more days, we'll do a 1BR. If we're going to be there for less than that, we'll do a studio.