The pure numbers without letters is in someway cleaner to me, isn't it to you? I mean a place only for digits appears a little more "formal", at least to me.
Only a suggestion, no sure if it is viable, but hope it will be useful:
I can see the stat box has a decent size, so in the case of 16 digits, the number may be written in 2 rows - one for min-dmg and one for max-dmg
As the number get to another 3 digits, a coma may help make it easier to read and make the layout look better.