Plastic body doesn't bother me in the slightest, find it strange that people bring it up tbh! I suppose it's because I haven't held a camera from higher up in the range like you say though. Although that clearly makes it a case of 'good' and 'better', not 'poor' and 'good'.
I had a quick look at Naith/Riad's D40 a while back and it confused the hell out of me, but if we're honest, it would only take a day to get used to 90% of the differences.
As for the OP, both cameras appear to be very similar so if you already have Nikon lenses get the Nikon, if not, go for whatever feels best. Compare the features side-by-side to see if one has something that you think you'll need that the other doesn't and also go to your local shop and hold/use both cameras.