RTR VII - mechanic, units - stats

[M@rkHoppu8]

Hi guys,
excuse my English, it is not so good, but I really want to help. Please could you someone describe me the mechanic of battles in point of unit stats? Example, I play custom battle and I put Galatian Infantry and Roman principes against and principes win very easily, however the stats of this units are almost the same. So I think I don't understand the unit stats, I thought If some units both have 12 attack, 24 defense - it might be a balanced fight... could someone help me please???

[mcantu]

Principes have slightly better armor and shield and ap pila. in the tests i ran, principes do win but its always close...

[fireblade]

Also, there are some stats that aren't shown on the unit card I think. Lethality, morale etc. Also, there can be a bit of variance which side you play with, as a human player has a little better control over the pilum throwing/charging compared to the AI in my opinion.