as for which aircraft VS are using, you could try and decipher it here:

http://www.v-flyer.com/chance.asp


and, for what it's worth, I think even the OLD VS PE seats were massively more comfortable than BA's WTP. Plus you'll get the new PE menu (which is fine, apart from BA domestic -style breakfast) and all the other little PE perks theyve introduced.

Definitely VS for me if I'm in the market for a PE seat (unless using BA miles to do MFU, which opens up another set of consumer dilemmas).