No 747 has the new PE seat (2010) on BA. Some 747s have new seat cushions and fabric, but they aren't the 2010 WTP product. Not all of the 747s have decent IFE either. You either get ancient IFE and an old 2000 model seat or you get good IFE and new fabric/cushions on a 2000-era seat. Also on BA you will have to pay for seat assignments too depending on status level.
I've flown in the 2000 WTP, 2010 WTP and AA's MiQ seat. I'd rank the 2010 WTP and MiQ relatively equal with a slight edge to BA 2010 seat if anything, and the 2000 WTP seat dead last.
I personally really like WTP but in this instance I'd choose AA.