What recorder would you ultimately be using? These are both great devices, but I think it's debatable if either one offers a benefit above and beyond most of the phantom powered recording devices available today.
The MP2 is a great little device if you're using a handheld recorder (i.e. the M10) and need phantom power or 3.5mm out. Functionally, it's still one of the very best units out there; easy to power and incredibly small. Sonically, I would characterize it as "warm" and maybe a bit less detailed than most most pres. Not sure I'll say anything more than that... I'd certainly love to have one in toolkit, but it would only get used for certain niche functions.
The V2 is considerably less convenient, but then again who doesn't love a good V2 tape? Its clean/transparent sound is legendary, but (continuing with the theme I'm trying to make) I'm not sure that it's a notch up from any of the better recorders you can buy today.