I actually think Id like it better if the brother was the main character.

But then, that would be like a lot of other mangas wouldn't it?

There's always going to be mangas with similar characters and stories. The brother just sounds like he'd have his own interesting story.

The words "a lot" accounts for something...

Maybe I don't mind using words other than *a lot* ...

Let me say it in another way. Being like a lot of other mangas is different from being similar with some mangas.