I went with the L200 but haven't had the others and so can make no valid comparison. What I can tell you is why I went L200:
Almost all of them (there were a few older and very basic versions that couldn't do this) you can drive in 4WD on the road whereas this will damage most other makes of pickup and so they are only RWD on the road and this is a disadvantage especially if you want to run AT type tyres that don't have the best grip on the road to start with. It also saves shifting in and out of 4WD when the grip levels are varying as you go along. The VW can also run in 4WD on tarmac or other surfaces with decent grip but it's 4WD system is a bit of a cheat compared to other pickups.
The L200 was a bit narrower and, perhaps, more agile than the others and on small tracks or tight spots this is a plus point as I think it will turn in tighter spots. Also if you ever have to drive it in town (a pretty miserable experience in any pickup) being slightly narrower (about 6 inches) makes a difference when it comes to getting into, and out of, parking spaces. If this is going to be an everyday driver for you do give some consideration to the practical and boring stuff like parking in town etc.