I would go for the pro...
1 - It has a front freewheel, most mod riders use them on the front.. And if you get into riding, you will eventually want a front freewheel.. because it easier and it gets a good gearing.
2- Got hs33 mounts on the back and disk mounts, so you can have a choice between the two.
If you go for the bird and then decide you want Hs33's then you will have to go through the hassle of adaptors.
I have rode both of the bikes aswell and i know some people locally that have them. They both feel pretty much the same but the pro has a better rear brake and can be uprgradeed cheaper, And it looks really nice in the colours it comes in.
Edit: Just read the pro comes with a tensile freewheel, they are pretty good as well.
Hoped this helped.
Tom