The 1h axe is better because it was buffed in the Aug. 2020 BBB / Patch 3.1, while the Crowbill didn’t receive any tweaks:
Axe
- Speed
Attack Speed Light 1 0.58s → 0.53s Light 2 0.53s → 0.48s Light 3 0.9s → 0.72s Push Attack 0.98s → 1.03s Heavy 1 1.13s → 1.03s Heavy 2 1.13s → 1.03s
- Damage
Attack Armor Target Body Crit Head Crit&Head Heavy (1, 2) superarmor 1 23.87 (25%) 35.81 (25%) 35.81 (25%) 47.75 (25%) Heavy (1, 2) monster 1 21.48 (15%) 33.42 (15%) 27.45 (15%) 39.39 (15%)
Aside from increasing the weapon cleave, Fatshark should probably increase the attack speed to differentiate it further from the 1h axe. Prior to Patch 3.1, the Crowbill was supposed to be the “faster” 1h axe.