What's the Difference Between .DEB & .RPM Download Files?

[Wireaddict]

This is a basic/newbie question but I was faced with this decision before I installed Vivaldi, Beta 2 today. So what is the difference between .DEB & .RPM download files? I use Linux Mint v17.2 MATE OS & a home-built 32-bit desktop computer. I chose the 32-bit Beta 2 DEB version after studying some of the Mint software download options & Vivaldi installed with no problems. But I still wonder, what would've happened if I tried installing Vivaldi with the .RPM file? On another note, although this is a Beta version Facebook loads & displays much faster than it did with Opera so I think you're onto something! There are some things that don't work right but I'm making a list & will submit them later, after I determine if they're problems or simply something I need to figure out. Keep working on Vivaldi; I hope it becomes a success for all concerned.