KM ZX5 conversion or new BJ4WE

[crf311]

My current 4wd buggy is the Kyosho Lazer ZX5. it's fully hopped up with all the PN Racing alloy parts, screw kit, composite top brace and shock towers... (you get the hint). I'm thinking about going with the KM Concepts conversion kit for it after using a buddies BJ4WE last weekend. Anyone having any input on this conversion? Is it even fair to compare the two even though they are both shaft driven mid motor chassis set-ups? Or is it that nothing is like a BJ4WE. Thanks for any info that you can share.