Nord user owner /here presently the Stage 2 73, Ive had electro 2 and 3 73 keys.
The Nord uses a Fatar action. There is a lot of debate on the velocity action for Acoustic Piano on the 61 73 and 76 keys , I cannot speak to the 88 since Ive never played one.
There is rumored to be an update for the stages(the piano just came out) that addresses velocity issues.
AFA the FEEL of the keys, I like them myself, and find the AC piano control OK , the electros work fine and you can get the Wurli to bark if you lay into it.
Organs have a hi lo trigger point setting so you can obtain the B3 triggering effect.
I would try to find a music store with one to see if you like it.Keybeds are like drawers, some hug you and some fit loose.