MDT ACC ELITE or XLR ENVY PRO NRL22/PRS22

I have both and love both. There isn't a wrong choice. Both have adjustable magazine catches which are a must for me. The biggest difference for me is the ACC elite has a longer forend, but I would run both without hesitation.
 
I like the XLR because I can pick them up used for around $800-$900. That being said I also like the ACC. I have the older version but have checked out the newer one at matches.

To me the longer forend doesn’t matter. I want my bipod far enough back that I can reach it to make adjustments on a stage if needed without totally breaking position. I’m 6’5” and with the bipod at the end of a XLR I can barely reach it.
 
I have shot just about every chassis made over the years and they all have pros and cons. I have just switched from the XYLO, which I really like, to the Envy Pro with the JV kit which I like even more as far as comfort and balance. If I could put the cheek and length of pull adjustments from the XYLO on the Envy Pro I think it would be the perfect chassis...of the two you are looking at I would tell you the Envy Pro.
 
I have a RimX in an MPA Matrix Pro and just took my Vudoo from an MPA BA Comp to the MDT ACC Elite. The MDT just seems to be more refined and has features not found on most all other chassis. At first I wasn't a fan of the LONG forend on a 22" barrel but it has grown on me. I was considering the Gen2 Premier but I knew I wouldn't be happy giving up some of the features that the Elite has.