That is the only difference if I remember correctly.
Can you guys help me put a min bid on them? I don't know much about MTG and I hate the people on the Wizards of the Coast boards.
Obviously some prices are going to flux alot, but stuff from before 6th is pretty well set in stone. Type 2 stuff will flux alot, like in the latest copy, Umezua's Jite(spelling is off I'm sure) is worth $5, but they've been going for as much as $20.
That will help you alot in finding prices. You could also look up some sites that sell single cards to price yours similarly. AnyCraze is one of my favorites for buying singles from, and their prices are close to the current going rate for the most part.