Rome were a more readily efficient army than Greeks.
That’s reflected in their costs.
However, Romans cannot take 12pt models.
So you could theoretically field 100% more models than them.
I get that there are other more stressing point value disputes (i.e. Leather Armour/Helmets, why ever take leather armour?), but on the whole, each army was never balanced (and still aren’t).
I wouldn’t worry about point disparity too much.
