The Incarnata is a great grower.
Where I live we get winter freezing temps which nips it back... but then it sprouts back and really takes off in the spring.
Blooms constantly too... until a freeze.
Because of the intense blooming I would plant it where it can climb and be appreciated. Really beautiful!
I grow Ruby Glow in my greenhouse... in the ground.
I've tried planting it outside... but here it won't come back from the roots like Incarnata does.
Much more tender and tropical in nature.
It blooms in the late Summer into Fall.
Both have a typical Passion Fruit taste... the Ruby Glow is much larger of the 2 with a yellow football shape when ripe.
The Incarnata has smaller egg shaped fruit.
Here's a photo of an unripe Incarnata fruit:
Here's a Ruby Glow fruit with a Frederick (Edulis):
For maximum fruiting... they both benefit from cross pollination with another variety like edulis.
I have done hand pollination and bumble bee pollination... both with success.