Either bike is a solid bet, depends more on how you plan to ride it, and how much you plan to "upgrade" it?
The Wee's motor is smoother, and there is an aftermarket pool of toys, miles long.
The Versys is a better handler in the twisties (pavement), with the smaller 17" front wheel, and generally a bit sporty config.
The Wee has more leg room, and fitted with a decent seat and windscreen, can easily be a multi-day tourer......the Verys, more of a compromise in this respect.
The Wee has a larger tank, and further range.
You will pay more for a Wee, they are easier to sell, and have a stronger following.......the Versys in the twisties, is more fun to ride IMO......trade-offs, compromises, whatever you want to call them, both are great bikes, just depends on what you value most.
I owned an 09 Wee, and now have an 08 Vee.......I have considered a Versys many times, as I really really enjoy the twisties, but have a tough time giving up on the creature comforts........point is, tough choices, but I've had 2 Stroms.