I studied, using both. If you intended on writing the V2, which is still available, you could use V2 or V3, where the V3 course will touch on more topics. I would suggest studying the V3 and writing the V3, it covers more topics, as more features have been implemented, since the V2. If you have handle on V3, you should be able to write either V2 or V3.

There is a listed:

practice exam

which is a good approximation of some of the questions you'll get on either test.