They really are completely different beasts. YA is about answering questions. Answers are short, and there is little followup. The emphasis is on getting it done. And the emphasis is on competing to be the best, insofar as other users think you are the best.
Fluther is about understanding things; looking at them from all sides; telling stories that relate to the subject. There is no competition, and indeed, criticism of comments is discouraged. Criticism of ideas is fine. Additionally, criticism of people is discouraged. It’s all about ideas here; pushing the envelope on our knowledge.
Lurve really gets you nothing, except the knowledge that some people appreciated your answers. It’s not even a good approximation of that, since a lot of people don’t even use it. Many a time I’ve gotten feedback via pm that someone really appreciated my answer, and I have zero lurve on the question. Feedback is more rewarding, because you know you’ve touched someone, and you know exactly who you touched.
We hold conversations here. We get to know each other. We want to get to know each other. A lot of what we do here is about personality. You can think of it more as a writing site than a “get it done” site. It’s more like a dinner party than a classroom. If you like to eat well, stay here. If you want to score well on tests, stick with YA.