There’s definitely some quality n the Vanguards, they have very good bones, so to speak. Forged action( or extruded, depends on who you ask) forged bolt, integral recoil lug. M16 style extractor. Field stripable bolt. So field stripable that I used pop them apart in my hand and pretend I broke it just to see the look on the owners face

.These aren’t cost cutting measures.
Downsides are sort of subjective, floor-plate, trigger guard and safety switch all feel a little rinky-dinky, and thee bolt stop is held in by a screw that you can break if you try hard enough. I wish the mag was longer. All in all a pretty good tradeoff for the cost saving. They usually shoot.
The Mark V is more like a bank vault, there’s nothing rinky-dinky about them and they usually shoot too. It’s probably the strongest commercial bolt action ever made, has a 60 degree bolt lift that some like and I have mixed feelings about, Safety locks the striker, which I do care about. The extractor is a bit small and if you load the snot with well used cases it might eventually skip a rim, or it might not. Happened to me,
In the end, I have both, like both. They are different thats all. Whether its worth to cost for you is up to you. I can’t tell you if your new rifle is going to shoot or not whichever you pick. There’s a bit of luck of the draw on any new purchase.