I have been testing the performance of these two greatswords, they are the same weight and have the same stat requirements. However, I have been comparing the damage these two swords dish out.
Normal +15: The claymore inflicts 169 damage and the bastard sword inflicts 175 damage on skeletons.
Crystal +5: The claymore inflicts 194 damage and the bastard sword inflicts 200 damage on skeleton
Lightning +5: The claymore inflicts 209 damage and the bastard sword inflicts 299 damage on skeletons
Magic +10: the claymore inflicts 156 damage and the bastard sword inflicts 163 damage on skeletons.
Enchanted +5: The claymore inflicts 134 damage and the bastard sword inflicts 142 damage on skeletons.
Divine +10: The claymore inflicts 165 damage and the bastard sword inflicts 173 damage on skeletons.
Occult +5: The claymore inflicts 140 damage and the bastard sword inflicts 147 damage on skeletons.
Chaos +5: The claymore inflicts 280 damage and the bastard sword inflicts 185 damage on skeletons.
The bastard sword is relatively smaller and shorter meaning less reach than the claymore, but it seems that with all upgrade paths (with the exception of fire, I don't have that for them.) the bastard sword dishes out a little more damage than the claymore.
The only real difference between the claymore and the bastard sword is the reach, damage, and their strong attacks when held with one hand.
Normal +15: The claymore inflicts 169 damage and the bastard sword inflicts 175 damage on skeletons.
Crystal +5: The claymore inflicts 194 damage and the bastard sword inflicts 200 damage on skeleton
Lightning +5: The claymore inflicts 209 damage and the bastard sword inflicts 299 damage on skeletons
Magic +10: the claymore inflicts 156 damage and the bastard sword inflicts 163 damage on skeletons.
Enchanted +5: The claymore inflicts 134 damage and the bastard sword inflicts 142 damage on skeletons.
Divine +10: The claymore inflicts 165 damage and the bastard sword inflicts 173 damage on skeletons.
Occult +5: The claymore inflicts 140 damage and the bastard sword inflicts 147 damage on skeletons.
Chaos +5: The claymore inflicts 280 damage and the bastard sword inflicts 185 damage on skeletons.
The bastard sword is relatively smaller and shorter meaning less reach than the claymore, but it seems that with all upgrade paths (with the exception of fire, I don't have that for them.) the bastard sword dishes out a little more damage than the claymore.
The only real difference between the claymore and the bastard sword is the reach, damage, and their strong attacks when held with one hand.