APEX is a variation of Climashield. It's lighter, warmer, and packs smaller. Paul used it in a few Jarbridges. I lucked up and got one from a member here recently and it friggin rocks!
I have a regular Climashield Jarbridge as well, and there is most definetely a difference.
No Cons for Apex, only Pros.
Correct me if I'm wrong Mr. Paul.