Im sure BM will be back but I'll chip in my 2p.
The texture effect on both is similar, I preferred the 3M stuff though. It seemed to me to be much sticker, hexxis stuff does stick don't get me wrong, but the 3M is (IMO) better for interior wrapping, deals with tight radius's and edges better.
On the outside of a car (or maybe larger internal pieces) the hexxis stuff is better however as its more easy to reposition and it does handle heat a little better than the 3M which in itself does a pretty good job.
horses for courses I think...
Personally I found the Hexis was better to work with on interior items than the 3M, it seems more flexible and the cast finish is better IMO.
As for the 4D vinyl, dunno anything about that...
How about a 1D vinyl?
http://www.ebay.co.uk/itm/121006851891?redirect=mobile