With a well fitted stock, I prefer a bead ( larger ivory type) and shallow V.
Most of my sporters ( like the Huskey 9.3X57) and my sporter 88s, have a U. There are nice silver medium beads. My 98 action 9.3 is well fitted to me and comes to the shoulder and I can see straight down the sights well lined up. My '96 action with the older style stock is much thinner on the comb and I have to adjust my eye to line the windage.
My Mauser 98 .375 H&H has a larger U and Ivory bead. It comes to shoulder with sights aligned.
I think the Vs are faster, if you are fitted well to the stock.
I have used Slanted blades with gold line with good success for longer range shooting. Past 100-150 plus meters, I prefer the balde with a square or U notch.

I think one of the worst (there are worse) are the German military V notch and barleycorn ^ front. Possible, but they take work. Note though the Swedish Mauser Sites with Blade and U notch. Much better for faster and precise shooting.

If I have a dangerous game Double ( I have drillings and Combos), If the stock is fitted to me, it woudl be the Wide V and an ivory bead (larger).
That's my two cents.
88MauSporter