Source mod - Hard
Witch 52
Fighter 62
Normal
Witch 52
Fighter 62
Unmodded - Hard (-25%)
Witch 39
Figher 46
Normal (+15%)
Witch 59
Fighter 71
I'm not sure what to make of it. Seems like the Source mod ditched HP scaling in favor of a different way of adjusting difficulty but I can't tell if it's working or the difficulty selector is just broken.