Originally Posted by blueshifty
They're both almost identical internally so efficiency will be similar (but a slight edge to the gt) and so will maintenance although the gt has a quick release bolt and the vx is threaded. All said they shoot similarly so the biggest question is the ~$500 worth it for improved ergonomics, macroless and slightly improved internals? (Plus the new GTi kit for the gt seems promising.)
I'm not a huge clone fan, but I do own one.. The threaded backcap isn't very hard to undo and it can be done by hand.
Macroless is more of a pita to service so I'd list that as a con for the gt.
Another con is the currently huge pricedifference so unless you really do need a nib marker i'd save the cash and get a v2 or vx.
As for ergonomics I can't comment, but it can't be $550+ better.