Probably one is offered with a so called "genuine eta movement" and the other one is the eta clone movement. If you ask me, don't go with the genuine eta movement, most of the time it is a an eta clone movement with eta stamping and if you are lucky to get a genuine eta movement, it is an old and used eta movement refurbished, less reliable IMO. ETA clone are just fine and are as good as a brand new swiss original one. And Ryan is an excellent and one of the most trusted dealer here so i would go with the intime version at 268USD for sure !

cheers