I'm confused.
From the ones I've tried...
P edulis & P edulis v flavicarpa: very strongly flavored, nice flavor, orange pulp, but rather sour
P ligularis: different flavor than edulis, not as strong a flavor but nice, clearish pulp, sweet
I've never had an edulis or edulis v flavicarpa that was sweet. Not in Costa Rica, not in Puerto Rico, not in Indonesia, not in Thailand or Sri Lanka. Someone could have developed one that is sweet but, I've never eaten that variety.
I would LOVE to try the other passifloras but I've sadly only bumped into edulis and ligularis as those two seem to be grown everywhere.