When you get right down to it there is only ADL, BDL, and DBM. You have blind magazine, floor plate and detachable box magazines. There are countless versions of each in every imaginable configuration. The CDL, SPS, Sendero, and most Mt rifles are all just versions of a BDL. They made Mt. rifles in SS, ADL configuration and I've seen cheap plastic stocks on BDL's and fancy high gloss Walnut on ADL"s.
I suspect the only real difference between BDL and BDL Custom Deluxe is when they were made and the description at the time.
