The Wyoming knife is a specialty device best used to zip open the gut cavity of large game. It is a knife one carries in addition to their regular knife, not to replace it.
The Cutco knives are all generally over priced for what you get and that one is a bit large for GP use, even as a "hunting knife". It is doubtful that you will ever be called on to tackle a beast large enough to need such a device.
I have killed my share of game over the years, large and small, and most of even the larger game has been dressed and skinned using a medium stockman style nonlocking founder. I carried a Buck medium stockman for 30 years and a Case medium stockman for the past 10.
https://www.smkw.com/case-medium-stockma...ed-micarta
Either of those knives would be considered legal to carry in GB and would handle any game you found in GB outside the zoo of a major city.
My fixed blade knives used on game are equally small, usually having an 8-10cm blade. I consider the standard Mora an excellent GP knife and I added a case of them to my preps back when they were $5 U.S.
If you want to find the best knife to use on large game simply visit the You tube channel presented by one of the butchers. I favor the Scott Rae Project. He does a lot of work on wild game, especially small game and fowl. Excellent channel.
Be aware that you will not skin most of your large game kills in the field. Large game needs to hang and age in the skin. Skinning will be done after you return home, and under more controlled conditions. All you will leave in the field is a "gut pile".
If in a SHTF situation and you happen across a cow that requires consumption you will either lead it home for dispatch or kill and quarter it on the spot using not a knife, but an axe! You had better post alert security while you proceed with the latter, someone might appear to object.