Not sure about the specs on the CHB, but i know the Kass is a mid wide, which may be slower edge to edge but a little more stable. If you have less than a size 11 foot, Lib tech and Gnu have other MTX options with a regular waist widths, varying levels of flex, etc. Get on your friends board for a couple runs or a day if you can, see what you like and dislike about the board, and narrow your choices from there. If you can wait, most of their boards are coming with Banana rocker technology as well as MTX next year.
Also if you're riding on fresh powder alot you're going to want a longer board. If you think the 159 is too big and you're looking at those two companies specifically i'd look into the 157.5 gnu rider's choice and 157 lib tech TRS, with the TRS supposedly having a little more flex but both generally highly praised. The banana tech is available for those two boards next year and is supposed to help with floating in powder.