I think the clear might actually have the larger volume, since it has the largest diameter of any mobius piece I know of. (I believe its 75mm)
IMO the ion hits exactly the same as the clear, it's just got a smaller can.
Everything is scaled down so well that they seem to perform identically to me.
Having said that, I prefer the larger volume of the clear, but the main reason I prefer the clear is the mouthpiece.
It's the absolute perfect bong/bubbler mouthpiece IMO. Just large enough to comfortably put your lips inside to make a seal.
I'd sell my ion right this second if I could replace it with one that has the same mouthpiece as the clear.
I hate how the mouthpiece is so tiny, you can either purse your lips to use it the traditional way, or you have to put your lips around the mouthpiece...
I had a 60t, and I was a little underwhelmed by it, but that was due to my expectations.
I figured Stereo had to = 2x as good, but it doesn't.
I wouldn't really call it better or worse than a standard matrix, just different.
I ended up selling the 60t, but I def plan on picking up a 60b (or 65b hopefully) in the future.