Now after I removed some comments
Now it looks like i'm talking to mysef
(Relatively)
On Topic: Jackson Sundown is a great horse set for adventures, it has the same amount of attack+defense as Perry's, but it focuses more on attack compared to Perry's who has equal attack/defense values. It is difficult for me to quantify these values considering that the formulas are not made public. HP reduces the chance of aiming and dodging, but it doesn't say how much. Why are these formulas not public? The fort ones are.
The HP formula is this one:
(LVL+25*STR)*(DEF/5+10) + 20*DEF + 1000
The damage formula is something very similar with:
Dexterity*1.15*attack value + gun damage
But it's impossible to deduce how much aiming/dodging you lose from having high HP. So i'm not sure if Jackson Sundown is better or worse than Perry's. They're probably about as strong, which is good. Perry is also extremely good at dueling, and Jackson Sundown at some jobs like hunting antelopes and hunting foxes.