I thought the 90 and the DNA shared the same neck, I could be wrong, anyway, the DNA shares the same neck as the DBK, that is one of the main reasons I never bought a DNA (that and the cost LOL) I don't like that neck. It is much thinner than the old profile Jem neck, I believe the VDY, VSK, VBK were all the thinner neck profile as well. BSB too maybe? can't remember now. I prefer the VWH profile above all, but really like the SK, DY, LNG, FP, etc.
As for feeling not as good as your 90, well, how much playing have you done on your 90? the thing about necks is, once you've put some time on a guitar neck, it wears into the fit of your hand, that makes if feel perfect to you, a new DNA doesn't fit your hand yet, I remember the first few times I played my VWH, it felt good, now, it feels great.
Guitars are a lot like shoes, you gotta break them in, simple as that