Well, I guess I´m not the right guy to answer this, considering I´ve already got the tank I want...
But if I had the choice I would definetly go for the CR-style.
I like the more rounded shape.
There are quite a few guys around who makes the CR-replica tank.
The problem is that if you want to use them on a roadgoing caferacer, you have to relocate your batterybox, electrics and oiltank due to the deep sump at the back.
The petcock is also located in the sump.
I predict a it would be a great seller if you made a CR750-tank without the rear sump and with the petcock in the same place as the stock tank.
Would make life easier for the cafe-people of the world.
A cheap price would also help up the sales.....
Cheers
Daniel