I've held the CA33E here in the States. They are great stuff... more and more people are getting guns from CA rather than Marui here in USA.
CA is high quality, pre upgraded, and full metal.
If you've never had the newer versions of the CA guns, u dunt understand.
I've seen a CA M15A4 SPC going through 15 000 rounds, no problems whatsoever. Just a few scratches and wearings from handlings, thats about it. They are rock solid.
As for the KSC one, I'll get my hands on one when I go back in Taiwan this winter