Aesthetics play a big role. The Rosewill is ugly, IMO, so I would buy the Leopold over the Rosewill. While I do like the Filco-style stabilizers a little better, it's not enough for me to put a big block of ugly on my desk.
The Leopold isn't a whole lot better, so I say get a WASD instead.
I really don't find the Rosewill ugly... except for that damn logo!
Seriously, why make what is apparently a high end keyboard and slap that goofy looking logo on it? Couldn't they just pay a graphic designer to come up with something a little more attractive? Other than the logo, it pretty much looks like a Filco with a red plate, which isn't really a bad thing in my mind, whatever quibbles I might have about Filcos (no cable channels or detachable cable option, for one) I think it's a nice, squared away board that's kind of elegant and understated, and the logo doesn't scream "I bought my keyboard at Big Lots" like the Rosewill does.
Granted, that's a little hypocritical of me, as I was using a Cherry POS board at work for a while, but when you're paying >$100 for a keyboard, I don't think it's unreasonable to expect it to exhibit a little more class.
That said, has anyone figured out how to remove the logo w/o damaging the case?