looks good.
but I dont see much of a difference..

the zzp tubing isn't smooth on the inside.
doesn't that defeat the purpose.

In the way of function there is a HUGE difference.

The ZZP intake tubing is smooth when straight and when bent it is smooth on the outside corner and all most as smooth on the inside corner (once compressed). The Intense intake tubing is perfectly smooth straight and/or bent. The only reason I chose ZZP intake tubing over Intense was because it is a lot more flexable (wasn't sure how it was actually going to be bent) and cheaper price/cheaper shipping.

I'd recommend the ZZP Intake tubing for an intake with abrupt bends or a intake that needs to be as flexable as cam be. I'd recommend the Intense intake tubing for easy FWI runs (99% of FWI'*) and semi-straight CAI runs, or where 3.5" I.D. are needed. If I was going to do it all over again I'd try out the 4" I.D. Intense intake tubing but don't get me wrong I'm perfectly happy with the ZZP intake tubing.