Nord electro 2 vs ne3.diferenciasnen sonido y teclado

hola alguien que conozca bien estos dos teclados sabria contestarme.el nord electro 3 es semicontrapesado o waterfull?

Nord Electro 3:
http://www.nordkeyboards.com/main.asp?tm=Products&clpm=Nord_Electro_3&clne3m=Specification

Keybed Nord Electro 3: 61-key (5 octaves, C-C) or 73-key (6 octaves, F-F). Velocity sensitive Semi Weighted Waterfall keyboard
Keybed Nord Electro 3 HP: 73-key (6 octaves, E-E) Hammer Action Portable keyboard

Nord Electro 2:
http://www.nordkeyboards.com/main.asp?tm=Products&clpm=Nord_Electro_2&clnem=Specification

Keyboard: 61-key (5 octaves) or 73-key (6 octaves). Velocity sensitive semi-weighted ”waterfall” (square front) keyboard.