Banana blossoms versus bean sprouts
They're a thing, though mostly eaten in India and other parts of asia . Banana Blossoms are actually typically found as a great big bundle like this 



You basically need to remove the purple 'cover' to get the little yellow flowers 
The little yellow things are the edible parts though you need to manually remove the stamen from each. They're slightly bitter and typically cooked. 

Beansprouts are... well sprouted beans - I believe typically mung or soya, and are a whole plant, not part of a plant. 

In short, they're completely different in every way other than maybe being tubular thin edible plant parts. Swapping in one for another isn't something that would work.