Difference between XH85 and XH91 series ???

[sonyxh85xh91]

while looking for a 43" sony, and nearly settling on the 43XH8505, I came across a 43XH9196 which doesn't seem to appear on Sony's websites (other than a minor reference at the top of the XH85 page where 91 is in brackets).

It only appears on Currys websites and the only difference I can find is that Motionflow XR is 1000 Hz as opposed to 800hz.  

A different model just for this?  Could it be specific to Currys?  They have the 8505 model as well for the same price.

thanks!

[Bydandie]

Indeed, I was simply challenging the assertion that all XH85 series were IPS.