For my results i used the "damage" blacksmithing mastery bonus, because both two-handed sword and two-handed axe get this. Swords can instead get a strength attribute bonus and axes a crit chance bonus. To complete this, here my stats for both versions of the two-handed axe (Level 7, Blacksmithing 5):
Two-handed Axe (Lvl 7, Blacksmithing Mastery Bonus: Damage)
86-172 (not upgradeable with whetstone)
5% crit chance
2x crit multiplier
100 durability
Two-handed Axe (Lvl 7, Blacksmithing Mastery Bonus: Crit)
78-156 (upgraded with whetstone, base was 63-125)
12% crit chance
2x crit multiplier
100 durability
