Here are some Merriam spurs for ya. I think its genetics. All these birds are from mountainous type terrain and on public land. I don't hunt farmland Merriams so I don't know what their spurs look like. I do think the farmland Merriams have better beards though, from the few I have seen.
All these spurs are from 2 year old or older gobblers. I base this on the fact that they all had long beards and a full tail fan.
The 3 on the right are my best Merriam spurs. The bottom right is the biggest and is 1 1/16". Probably a 3 or maybe 4 year old. While more pointed I wouldn't call it sharp.
The 2 bottom ones on the left have one "spur" that is just a very small nub (see close up pic). On the bottom left set, one has the black spur that is really more typical of a jake spur.
The far left middle set was a boss gobbler for sure. At least of his 3 hen harem. He gave me quite a neat hunt too.
I have other spurs but they are just your typical 3/4" 2 year old type.