Rounder is billed as a "Belgian Style Pale Ale". When I pulled out my glassware, I noticed that the Blue Moon Pale Moon is described as a "Belgian Style Pale Ale" - which is a beer that is listed on the Original 152.
So, it's my fear that they are a very similar (if not the same) recipe. However, I hold to the notion, that since they changed they name, they did also make changes to the recipe.
I drank the Pale Moon before I ever started paying attention to my beer, and I don't remember it. So, Rounders is an enjoyable beer, but I don't love it. It does have some nice Belgian flavor, goes down very smooth, and has no bitter aftertaste. Really, there's no aftertaste whatsoever. It's ok, I like it, I don't love it.