If I am in a situation where I am on the attack or to a base with a horde, I choose the C-hog. Why? I can conserve E better in a C-hog at higher altitude and instigate the fight and merge with E on my side.
In a base defense situation, I would go to the spit (5,8,9) because they are a little more agile in tight defensive situations and I like how they handle in lower altitudes.
I like both in different situations.
My 2 cents.