It's a bit of a mixed bag. I do enjoy Lemmy. I think that the conversations that take place here are interesting (though many now revolve around Reddit in one way or another). I don't really find the front page to be as good as Reddit's.
And then, of course, I think the most important difference is that Lemmy draws a specific type of person, even after the Reddit migration, and there aren't as many of us as there are average Internet users. I'm not saying Lemmings are a special breed; rather, I'm saying that we're the sort of people who might have used Usenet at its peak. We're the sort who might be Linux users. Many of us are morally aligned with open source technology and the ethics thereof. This makes the discussions a little less diverse on Lemmy than they are on Reddit (which can be good and bad, depending on the sort of conversation).