I feel like they are all the same deer with correct guestimated ages and the 110-115 score seems about right. I don't feel like he degraded any either, I think he gained width, mass stayed about the same and the brow tines look close enough to just be an annual change between the latest two pics. Bucks don't always gain antler between ages 3-4-5, in many areas of the country it's just normal for them to have subtle changes but little increase in inches. Even here in MO and KS sometimes bucks just don't gain from one year to the next for whatever reason be it the nature/genetics of the deer, nutrition, health issues or whatever. "Trophies" are regional, if that's a nice deer for that area then I'd take him as I'm confident he's mature, his neck is well formed and runs straight to a deep brisket.
