I've put together a list of all the changes I can think of since the first version, I've probably missed some of them though.
Changes since Nexus-Mod Version 1:
1)New factories+modules
2)New Power generator + module
3)Texture page 12 vastly changed:
New delivery point numbers,
Research facility changed to suit NEXUS
Comand center changed to suit NEXUS
Small change to walls
4)(page 17)Turret mounts darkened
5)Texpage 10 darkened
6)Close button on the HUD changed
7)Viper, cobra and python retextured
8)Leopard, Panther, Tiger, Bug, Scorpian, Mantis, Wyvern and Dragon textures changed (texpage 14)
9)Pie file for towers changed
10)Command center sensor changed to SUPER rather than STANDARD
11)Command center sensor changed to a large wide spectrum sensor (It still has the same sensor range)
12)Satelite uplink base plate added
13)All texpages with baseplates use Urban baseplates
14)Repair facility retextured
15)V-TOL factory changed
16)Texpage 13 vastly changed
17)Some pie files retextured due to polygons being badly textured
18)Cyborg textures slightly changed