KJW's are clones of TMs.
Good clones, but clones none the less.
Its like comparing a full metal echo 1 MP5 to a TM M4
I would say, go with the TM, TM makes some of the best GBBs on the market today, and their high-capa line up are some of the best. Don't let the ABS slide fool you, they are very, very solid, and can take propane well.
It's better to light a candle, than to curse the darkness