The fork rake/offset is the biggest difference, I doubt the handlebar height make that much of a difference, I have a very long one that cover the entire headtube length (220mm).
I have in the past mount a front rando rack on a bicycle that's not optimised for such load, and consquencely does not handle that well (steering feel stiffer, does not plane well, etc.).
Getting a fork made specifically for a front end load would be the best way forward if your bike geometry don't work with a front end load.
The fork rake/offset is the biggest difference, I doubt the handlebar height make that much of a difference, I have a very long one that cover the entire headtube length (220mm).
I have in the past mount a front rando rack on a bicycle that's not optimised for such load, and consquencely does not handle that well (steering feel stiffer, does not plane well, etc.).
Getting a fork made specifically for a front end load would be the best way forward if your bike geometry don't work with a front end load.