A lot of the difference is going to be subjective. For example, I prefer the foam-like material of Titanium Goat poles. They dry out much faster -- whereas when wet, cork tend to stay wet and clammy longer! The subjective part is that this may or may not be an issue for you.
As for the contour of the grip, again, having used both TG and GG LT4's -- I have a slight preference for the TG's smooth and comfy grip over the GG's sculpted but (to me) less comfy grip. So again, subjective.