What kind of camcorders might give footage that looks the same as the 24p 1920x1080 footage i get with my HMC-150?

I'm making a film that is a long interview with one subject ala Errol Morris' "First Person" series. i want several cameras on the person at once. My main camera is the HMC-150 but I'd like to set up two small camcorders to also record at the same time. I'll be shooting in 1920x1080 24fps. If I want my footage to match, do i need to use a Panasonic camcorder? Similarly, if i shoot in anything other than 24fps, will it look weird when I try to edit it in 24fps? I know it's possible to do that but that doesnt mean it looks good....