I ended up getting the Sword of the Temple Guard. My logic was that the hero could swing it faster than the other and I think it may have cost a little less (maybe? I forget now, but that’s something I would have considered).
Apart from that the DPS differences are minimal (SotTG 206.1 vs SotF 211.5) when you’re talking about attacking enemies with higher health, and the difference is irrelevant with lower-health enemies. I just wish one of these had cleave or power-up!
It seems like they are equal.
50 damage times 4 swings a second = 200.
100 damage to 2 swings per second times 100 damage = 200.
So logic is against you but I would do sword of forgotten you could get an extra blow right before someone with temple guard and that could mean winning or losing.
I think fast sword is almost always better
The only case then high damage sword is better ( but it is runesword not sword of forgotten )
It is the damage done leaderboard
If you use high damage sword you can do more over-damage per enemy