This datapack lets you type /trigger GetHorseJumpstrength, /trigger GetHorseMaxHealth or /trigger GetHorseSpeed to get these stats without having to tame the horse first and still don´t know wich horse is better. The Stat Jump Strength ranges from 0.4 to 1, the max health stat ranges from15 to 30 and has to be divided by two to get full hearts as the game treats it as hp (Half Hearts) and movement speed, or just speed, ranges from 0.1125 to 0.3375. If you want to know more about the stats just go to the mc wiki https://minecraft.fandom.com/wiki/Horse. When you use these commands you will see that the horse you get these stats from is highlighted with a glowing effect. So I have fun grinding for the best horse!