The two shapes get offered side by side as a taste question. They are not. The deciding factor is whether the air moves.
Still air favours the teardrop
The closed curve tensions the fabric top to bottom, so the shape is held by its own construction.
In a hall, a foyer or a shop, that is the difference between a flag and a hanging strip of printed fabric.
Moving air opens it up
Outdoors with reliable wind, tall tapering shapes come into their own and carry more height for the money.
That is a genuine advantage and we are not going to pretend otherwise.
Print area differs, and not in the teardrop’s favour
The curve costs usable panel. A rectangle or blade of the same height carries more legible copy.
If the brief is words, buy the rectangle.
Footprint and aisles
Teardrops sit on compact cross bases, which is why they fit stand corners and walkways.
Check the base diameter against the aisle rule before you order, not after.