Well, hard to say. I'm a lazy potty trainer, I can admit that.

After trying for almost 2 years with Jacob, I realized that I just don't have the patience for it. I know, it's bad, but I am a slacker! After all sorts of tactics with him, we finally gave up for a month then took the diapers away when he was a little more than 3 - he had 3 accidents and was trained. So I did that same approach with the other 2. Encouraged it but didn't really try to "train" until they were 3, then one day we just said goodbye to diapers/pull-ups and that was it. We completely bipassed pull-ups with #3, and we made a big deal about taking him to pick out his big kid underwear.
But, I got off topic a bit...really I don't think either sex was easier or harder. Isaiah was the easiest, then Jacob, then Clara only b/c she had problems with bedwetting. The good thing with a girl though is they always sit...no trying to teach them to stand to pee! I just think my kids weren't ready until 3, regardless of what I could have done. So with Caleb, I'll go the way I did with Isaiah - encourage it but not really "train" and when he's around 3, we'll bypass the pull-ups and go right to undies.