Fampyr does absolutely nothing for the game, except making it sound pretentious.
Wel-l-l...
Thing is, there are significant differences there too. Vampires are --
- blood-drinkers
- immortal, can only be killed in specific ways (stake through the heart, decapitation with garlic in the mouth etc)
- born of an ancient curse
- can transmit that curse to others, creating new vampires
- can't tolerate sunlight
- often ascribed powers like being able to transform into animal or insubstantial form
- often ascribed weaknesses like garlic, running water, certain plants, and sanctified objects
Fampyrs are --
- eaters of human flesh
- mortal, eventually degenerating into darghuls, then guls, then revenants, then skeletons, then dust
- created through animancy
- cannot transmit their condition to others
- have few traditionally vampiric powers (charm/dominate is the only one we know of)
- have no traditionally vampiric weaknesses (that we know of)
Both are --
- undead
- self-aware
I.e. IMO the differences are big enough that it would've been wrong to call them vampires. OTOH they occupy the same position in the "undead hierarchy" -- not quite as powerful as "liches" like the archmagi, but definitely higher than darghuls or the rest. So a name that suggests "vampire" also makes sense.
Whether "fampyr" is a good choice or not is, of course, debatable. I think they did better with "spirits" like Cean Gŵla -- for me at least that suggests Bean Sidhe (Banshee) without being
too close. Nosferat?