I started an article about why flat-calling first-round raises is frequently a good play in stud variants where it rarely is in LHE. Maybe I should finish it. I could use the $200. This is also a topic I think I could get a good article out of. I'll give one example, but there are plenty of others.
I'll use 8
7
in LHE and (2
8
) 7
with one club gone in stud. I limp in with the first hand under the gun all the time because I play in ridiculously soft games and I enjoy gambling. This is exactly the kind of hand that you'd like to see the flop for one bet with, but if it's raised behind you, your implied odds would be shot. You probably wouldn't want to play it UTG in a tough, full ring game. You might raise coming in with it if you thought that there was good chance that you'd steal the blinds, or maybe your opponents aren't giving you enough action, but I think most good players are dumping this hand UTG in a tough, full ring game.
On the other hand, I think that just about all but the nittiest stud players will play any low three-flush with one of their suit out for one bet or less. There are several important distinctions. One, the stud hand has a much better chance of making a flush. I think it's 19% for the stud hand and 6% for the hold'em hand. Another consideration is that a raise--more accurately a completion in this case--doesn't blow your implied odds in stud quite so badly as in hold'em. The completion brings the betting level from some fraction of a bet to one bet, whereas the raise in hold'em brings the betting level from one bet to two. Also, you have one more big bet round in stud where you can collect bets if your draw comes in.
Hopefully, you can recognize other hands where this applies. I will say that you wouldn't be far wrong if you never open-limped in razz (and I rarely do myself), but I open-limp all the time in stud, stud/8, and O/8.