Cuiseag's Scythe and Cuiseag's Hammer have the same stats, dps, and 3 STR 1 QUI/DEX bonuses as the other hand weapons. As with the others, the difference is speed:
Scythe spd / delay = 4.6 sec
Hammer spd / delay= 4.2 sec
note that there's some confusion on the Hammer -- the spd on the small picture is 4.1, but in the text expansion under info it's given as 4.2