-picture number 1 - Spencer version 1 (from NSAPB 1.0)

-picture number 2, 3 & 4 - Spencer version 2 and Withered Spencer(started to be used for NSAPB 2)

-picture number 5 & 6 - Spencer version 3 and new Withered Spencer(will be used in NSAPB 2.0 & NSAPB 2)

The main thing which changed in Spencer is his head shape(from a simple to more aligator like) and size. His new design have gotten a white shirt and brown jacket. Thanks to Spectre I remembered that Spencer's first concept had a hat, so I gave it to him. Next main thing which changed(and so it in Vermin) is his tail. You mostly couldn't see it(in first game you can only see how this tail looks on Vermin on camera 1B), but in the sequel, because of him crawling in the vent it will be more possible to see that tail's design(picture no. 4). So it started as a simple row of cylinders and cone, transformed into full simple reptile tail shape and end up as a moving and good looking mix of both early versions of it.

Withered Spencer have got similiar damage to his early version but with more damaged torso, he missing his aligator right foot and he have a bit more deformed frontal jaw.