Not to get too technical but the CPU and related chipset are not the only thing that determines a computer's architecture (hardware design and method of implementation). Are Intel Macs really PCs? No. Are PCs the same as Intel Macs? No. There have been several different "personal computer" hardware implementations in the last 10 years. One aspect that separates them is their method of booting such as BIOS, Windows-based EFI (a.k.a. UEFI), Apple's Open Firmware (pre-Intel Macs), Apple-implementation of EFI (Intel Macs), and Sun SPARC OpenBoot. The latter is very similar to pre-Intel Mac architecture. None of these hardware forms are truly interchangeable. Virtually all Windows-based computers use BIOS architecture. No Mac ever has or ever will use BIOS, an architecture that even Intel says is terribly limited.
Sun SPARC uses Solaris, a UNIX flavor OS that is not far from Mac OS, and that is one of the main reasons why the SPARC computer is the other popular choice for video editing. You can't get any "Setup" screen on a Mac by pressing delete at startup or anything else. With a Windows-based computer, you won't hear a musical startup chime, nor can you press keys to get Firewire Target Disk Mode, Netboot, or the Startup Manager. You'll never see a flashing folder icon on a Windows-based computer if you take out the hard drive.
Your real question is how to make your Windows-based computer equal to a Mac for video editing. The answer is simple: use the best video editing applications that were used to make movies like Star Wars, Lord of the Rings, The Matrix Reloaded, and X-Men 2: Final Cut Pro 4, Shake, Logic, and DVD Studio Pro.