From the looks of it, Holsteiners that are either imported and from Germany, have the thicker throat latches, and horses that are in the US ( like they were born here from an american mom) seem to have a thinner throat latch, but I could be wrong.
There's not a lot of information on that.
My two cents:
I get the impression (I may be wrong) that a finer throatlatch is more of an American concern than a European one, if you know what I mean. I never hear people complaining horses' throatlatches are too thick here or in Europe, whereas people from the US I speak to always have this concern, and have practices such as 'neck-sweating' I'd never even heard of before.
Likewise Europeans/Brits mainly often like a larger, straigher-profiled head - it's even desired in some breed/type standards. There seems to be a big demand for fine, often slightly dished profiles in the US.
I've got some pictures of my 'ideal' conformation. They're a bit different to the rest of you guys!
I trawled the web for mountain and moorland champion pics...so much choice! It was really hard to choose my favourites so I'm sorry if there are too many.
We're on number 13, right?
Welsh pony stallion, Rotherwood Casino Royale, British champion
Welsh gelding, not 100% on which section but he's pretty nice. He's given as a breed standard illustration in a lot of places.