So having small hands and coming from a WMO I was looking for a replacement. So I tried these two out and here are the results.

Abyssus:

Cons:
Shape isn't for everyone. It's very palmable and almost a combination between an ergonomic and ambidextrous mouse. Razer seem to go for aesthetic designs that can be negative to the mouse.

Clicking in middle mouse button takes a little to much force and causes a lot of vibration within the mouse.

Pros:
Perfect glide and feet
Cord is light and flexible
Perfect weight for it's size
Weight distribution is decent
Sensor feels better than the G100s
Switches are a treat to use
Feels really sturdy
Looks nice

The side grips are decent compared the old deathadders glossy ones were if you are sweating it's like trying to hold a lubed up dildo.

G100S:

Pros:
Shape +1 (most claw users would love this)
Sensor

Cons:
Build quality (feels almost hollow)
Switches feel terrible compared the abyssus
Cable was annoying because it was stiff
Weight distribution was horrible
Feet don't glide well at all
Looks bad

Overall the G100s really does feel like a budget mouse with excellent shape and decent sensor. If only there was premium edition of the G100s that improved on the quality of the mouse.

The Razer Abyssus is really a treat to use that is if you can deal with the unusual shape that are present in most Razer mice.