The thing that makes Burnice more terrifying than Pyro is that she actually KNOWS what she’s doing, and from the looks of things, she likes it!
I don’t think so. Burnice may have some hesitation on burning some things, and people. Pyro, as shown in the comics, usually hallucinates the world as very dull and grey. Rainbows and candyland is specifically how he sees fire. To him, fire makes things happy, so he has no hesitation, no remorse. He is making everything happier. Do you want him to make you happy too?