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.

I only have the Jr. It's a fantastic toy, but if you like a lot of girth, you might want to get the original instead.

I love everything about the bigger Tentacle, but I do agree it just depends what suits your needs.

Depends on what you want. The tentacle is very, very girthy and it has an extremely pronounced texture. It's not for the faint of orifice. Tentacle Sr. also has quite a dramatic curve, which hits all my spots really well. I personally love it, and I wouldn't have been as excited about the Jr., but if you know you're not gonna like the 4" wide base and rough suction cups, go Jr. It's still adorable, and it still glows in the dark. And I'm pretty sure it's cheaper.

Right now I say Tentacle since it's the only one I've tried