It's not wrong for you to say you don't know, but probably you should figure out what you want Because it would suck buying a 3rd bike because the first 2 aren't quite what you really wanted. Not that I don't have 6 bikes, but I really try to make myself justify what the purpose of each bike is (not matter how lame)

Go test ride them all and see what feels right anyways.

If you are mechanically inclined and want to buy all the tools, working on your own bike isn't hard. And you can sometimes pick up pieces used and the rest of that to make it not such an expensive endeavor.