I saw some posts about this. We did some testing and got our own damage values. Not sure why other values have been found, but they might not have known that Samurai takes less damage from melee.
Scout melee damage
Light 122, Heavy 185
Recon and OWLF Operative melee damage
Light 124, Heavy 189
Assault, Dante, Dutch 87, and Dutch 25 melee damage
Light 131, Heavy 199
Support and Isabelle melee damage
Light 141, Heavy 216