Quite different. He throws in some free roams/mini games, and it is extremely intricate pathing/variables. It's not simple, you get points instead of choices and he has a formula that I don't think many people have been able to understand. You get percentages with each of the girls and it is very difficult to get on or off girl's paths.
There is a creeper path (which I don't like), that I don't play, but you miss out on the rewards and special renders (I just unlock them with URM). There's 8 LIs, 1 has a boyfriend, 1 has a FWB, and 2 of them are in a lesbian relationship with each other (1 is BI, the other is 100% lesbian, so it's not for everyone). Hopefully, better endings than DK.