I can't provide you a direct comparison, or probably the detail that you are looking for. All I can add is that at $350 you found a good deal on the 60's, even if v.2. I just sold my 60's v.4 for $900. When I first purchased them, they replace my Mini Monitor's v.3. Not a fair comparison, as the Studio 60's just were that much more commanding. By commanding, I mean that they did a great job filling the room and reaching much lower if running full range for music.
Keep in mind, I do know that there were significant changes in the Studio line between v.2 and v.3 (I don't think nearly as much from v.3 to v.4).
If you choose to purchase the v.2 60's, I can't imagine you would have a difficult time selling them for near the purchase price if you are unhappy. Part of the fun in this hobby is trying things and swapping it out. At least it is for me. I purchased most of my theater components used, makes it easier when turning around to sell soon after if you choose.