AFAIK, an efficient alcohol stove must use the alcohol vaporizing method. With a physically larger stove you will need to apply additional efforts to preheat the stove so it starts vaporizing. I'm happy with the cat can stove design after trying several. Very simple to use, all in one, and quite efficient.

Playing with the reverse flow gasification wood stove design right now.

Why do you need a larger stove by the way (your goal)?