Savage,
I think the problem here is the M110 argument is performance based on the criteria laid out by the users, the US Army. In this case, the M14 was not selected and the KAC variant was successful. So you can make an argument that the M110 is better than the M14 upgrade.
H20 is making the argument on a cost/value proposition. IE, the rifle is already in the system so the incremental costs will be cheaper. Unfortunately if cost was the only criteria, this would be a strong argument however, I would suggest there is more to it than cost. In the big picture, the purchase of tooling, course development for training etc, would eclipse the savings and it will likely be the same cost. I am an M14 lover but I don't think the M14 can meet the criteria based in the contract without some work. That being said, if you stick with a cost argument and negate the user requirements using an inuitive argument of relative performance, then it is rather hard to have a discussion.
What we do know:
1. M14 system was entered in the SASS competition
2. KAC M110 variant won the contract and was compliant to the contract Statement of Work.
3. We don't know if the M14 variant made the minimum compliant line or how it placed.
4. We know the M110 is the the army's choice for sniper and DMR.
5. We know the M14 is in the system as a battle rifle.
6. Units have been spending unit funds to upgrade and sustain the M14 variants
7. There is no US Army maintenance program or sustainment/lifecycle management for the M14.
8. The US Army has not specified not coded an M14 based system since the M25 effort.
9. The US Army will be replacing M14s with M110 for overseas deployment as the priority for issuing.
10. KAC is producing 200 systems a month currently.
So people can draw their own conclusions on the future of the M14 in the US Army. What this says to me is that the sun is setting on the rifle in the US Army. Emotionally desiring the sustainment of the M14 is not what the US Army wants nor what it is doing. So is there an argument that the US Army is wrong and the M14 aficionados believe the M14 based system can do it better and cheaper. I think if you brought the M14 upgraded system to a national level including all the costs...not just the rifle, I think you will find there is little difference in overall costs. It is not just simply the cost of the rifle.