the CEN has some bad reviews, wouldn't want one of those. traxxas used to make a 1/16 rally, and they even had a nastruck! really cool stuff back then, not so much now. but teh new bl-2s and clipless is the coolest thing for a while.
this is the offical website: https://www.kingmotorrc.com/product-kmc3arr#
and it does not have full time 4wd. it has the ability to run 2wd. super cool!