I don't own the R2 version and I have no idea why there is a difference but I can safely tell you that the difference between 130 to 145 lumens is so negligible that you won't be able to tell much of a difference.
Our eyes are logorithmic and we would need at least a 40% difference in the lumens output before we could spot a slight difference.
Seems like they might have left out the update of the lumens, even the D10 image is that of the first version (Q5). This is the specs from Nitecore's press release. (source)
And, isn't there the XPE R2 as well as the XRE R2? So just saying R2 isn't really specifically talking about which family of CREE LED's the R2 belongs to.