It depends on your own preferences and how similar you want them to be. There's definitely better incest games out there in my opinion. Limiting myself to brother/sister/mother stuff for a moment, I'd say that Man of the House, Sisterly Lust, Echoes of Lust, and a bunch of others did that genre much better. If you're looking at even more similar, I think the original Big Brother was the better game before it was abandoned, even though it suffered from a slow pace as well. It's influence on BBS is pretty heavy.
BBS does kind of fulfill a certain niche though, even if I think the verdict is still out on exactly what that niche is. There are some remakes and very similar games in their early stages. but it's hard to say how good they'll be. Or even for the ones using the exact same characters, ultimately how "similar" they'll be. There's more to catching the feel of a game than the same story and characters. The execution matters too, among other things.