Zweihander vs claymore

Which of these is better for a lvl 99 build?
I just began a new character (knight class) and I'm going to use one, or possibly both.
Current stats are: Vit-15, Att-10, End-17, Str-24, Dex-12, Resis-10, Intell-9, Faith-11.

I'm looking at taking Vit and End to 40 and if I decided to go with the claymore take Str and Dex to 30 (thus a quality build). I could drop Vit and End to 30 and move Str and dex to 40, or I could just put them all at 35.

However, if I use the zweihander, what would a better investment be?
I am not going to invest at all in intell or faith, so the weapon(s) will be +15 at some point.

As for armor, I am going to use heavier armor (not giants or Havel's), probably black iron, elite knight, maybe a mix-match of smough plus something else.

Thanks Ladies and Gents for any advice given.

They're both best in quality builds, which one you use is really up to you. For quality build you want to get to 27str/40dex, since str gets a 1.5x bonus when you 2hand it (27 x 1.5 = 40.5). If you're going to PvP you want to try to at least have around 1500hp as well.