It's a choice. If a shooter is looking to squeeze every bit of accuracy, typically, a quality, WELL BEDDED stock can have the slight advantage. That means a McMillan with a professional bedding job. Now, either optian can outshoot 99.99% of shooters. Professional Competition shooters are gifted. THEY are that .01% of shooters that may see that slight advantage. Are YOU one of those shootists? I am NOT. I chose an MDT TAC-21 chassis because it is delivers exceptional performance, and I love the looks. I recommend you go with the one you like the best, as you most likely fall into the catagory of 99.99% that it won't make a difference for. JUST LIKE ME. Go with what you like the best.