I have to agree with Ryuson; it just all depends on what you're looking for.
The original has more girth and is a little firmer. It's more filling and better for g-spot/p-spot. Plus, the details are better on it. I don't find the suckers as realistic on Jr. The suckers are more subdued, and the surface is very smooth. It's also more wiggly.
Generally, I prefer the original for vaginal penetration, and Jr. for anal. Of course, Jr. doesn't have that great of a base for anal. So, be careful with that. Of the two, I'd say the original is less likely to get sucked up your butt. It doesn't really have that great of a flare to the base either, but it's better than Jr.