[Question] Horse and match Grading

[efunovasky]

Can any brotha tell me how the match or horse be graded?
e.g. 3YO, 3C6, 3MDN..... which match got higher standard.....?
or where can i refer to of the above grading?
thank you very much!

[efunovasky]

can i said that the prize money for the horses of each match is proportional to the standard of the match?
e.g. match A had a total prize money of AUS$100 is definitely had higher standard to AUS$10?