It is very much a case of horses for courses. Although I presume that you are actually talking of purchasing an Articulated (Pivot Steer) Lift Truck and not a VNA as they are different classes of truck.

I have used Flexi, Bendi and Combilift trucks and each has its own unique charcteristics and it does tend to become a case of getting used to the manufacturers own style given that each truck does tend to do the same "job". Personally I wouldn't rate one above the other as each had advantages or disadvantages.

From a commercial point I guess a lot depends on your budget, what the supplier offers you in terms of service/maintenance, supply and options. Having been responsible before for sourcing a new fleet of lift trucks I spent many hours pouring over details, specs etc and visiting dealerships. What it came down to in the end was really personal preference I guess and the truck I felt most comfortable using and then training my staff on.