The NeXT-station is the Amiga for the grown-up.
The NeXTstation is nothing like an Amiga. I've got both (side by side, actually) and I much prefer the Amiga. The NeXT is very slow to boot, tedious to use and doesn't do very much well. It looks awesome, but other than that I'd say the Amiga blows it away - in usability, flexibility, responsiveness. (even though the Amiga has a slower processor)
Commodore needed a Steve Jobs (or his non-union Mexican equivalent) to beautify the Amiga and create a "reality distortion field" to frenzy the masses. Instead, Commodore created a "buyer confusion field" and sat on their asses doing nothing.