Stat Descriptions are how horses compare to one another naturally, and it determines how fast and well they can gain in specific areas, it also playes a large role on its offspring (as well as breed and conditioned stats). All horses are born with 90% of their natural potential. Here is the order from worse to best in which the descriptions represent :

1)poor
2)Below Average
3) Average
4) Fair
5) Fairly Good
6) Good
(the next ones have a smaller marginal difference)
7) Very Good
8) Extremely Good
9) Supurb
10) Fantastic
11) Extraordinary
12) Amazing
13) Phenomenal
14) Inconceivable

Movements:
1) heavy footed
2) normal
3) fairly light stepper
4) light stepper
5) extravagant mover
6) lavish Dancer
7) flamboyant
8) superfluous
9) fabulously gaited