well, and oops I'm kinda gonna have to repeat the reply I just made to someone else :p

the BUBBA burger doesn't really imitate the meat flavor. There are some whole peas and carrots in the patty, so it tastes a bit like seasoned grains and veggies. Yummy, but not a meat flavor. It's more just about being in "patty" form so that it can be a good vehicle for whatever toppings you want to put on a burger or a sandwich.

Then there are other ones like the Beyond Burger that do taste like meat and feel like meat, and even fry off in a similar way (they use vegetable oils to approximate the animal fat, and it fries out of them as they hit the pan).

Black bean patties are also popular, and of course have a bean taste to them.

So there are different choices to play around with.