Pull Timing Boost
Yes, that is what I thought as I had found a table that showed the features of each of the Ultra models and the Ultra Plus appeared as you described. @ $430 that's a good deal and is roughly $100 less than the PO.I. distributor with nearly identical features. Certainly parts and service would favor the MSD unit over the P.I. distributor.
Your job must be hectic at times but really enjoyable for a gear head.