If my memory serves me well, I believe the knives tested were COTS. Gerber, Buck, etc. The first knife off was won by Mad Dog Knives. After reconsidering using Kevin's services, commercially available cutlery was considered.
The Mark III was used as the benchmark to test against. Not a big leap by any means. Tips broke aplenty on that design but the sheath is pretty servicable. BTW , the new tip design by Ontario cured the tip breaking issue but a little to late to affect purchasing decisions.
The SEAL Pup is more popular due to its size. What it comes down to is what can I get for free, break, and get another one quickly. Save the precious dollars for more fun things. Only on Bladeforums does anyone really care what knives are used, abused, etc. Hope that helps some. There have been quite a few threads on the subject. Do a search and you will have more than enough interesting reading for the evening.