have a shocker/ego and to be honest, i love the shocker and the ego, tho they have a totally different feel.
the ego is super efficient, light and imo bit more kick(maybe my setup)
the shocker, quiet, accurate and light, relies on o-rings, and wen one goes thats it, but i have only ever had one go.
dont really think there is alot of performance difference, but the most important thing is feel, try one of each
can i add customer service is important, and PE is second to none.