Dolphin vs. PCSX2: GameCube Emulation Slightly Edges Out PS2

While both emulators have matured significantly, Dolphin is held in slightly higher regard because GameCube titles are less demanding on hardware. As reported by OC3D as of 2023, Dolphin can emulate 97 percent of GameCube games, while PCSX2 can play 99 percent of PS2 titles. However, PCSX2 requires a more powerful GPU. For example, running GameCube games at 4K/60 FPS works well with an RTX 2060 or Radeon RX 5600 XT, while PCSX2 benefits from a stronger card like an RTX 3060.

The main reason for the difference lies in the PS2's complex CPU. Sony's Emotion Engine, co-developed with Toshiba, was built around parallel processing, which gave developers flexibility but made the system notoriously difficult to program for. That complexity carries over to emulation. The GameCube, by contrast, uses a more straightforward IBM "Gekko" processor, making emulation relatively straightforward.

Another factor is that Dolphin has been around since 2003 and became open-source in 2008. This allowed programmers worldwide to contribute fixes and enhancements, such as higher internal resolutions, expanded controller support, anisotropic filtering, and a patch for 16:9 widescreen. PCSX2 is also mature, having released in 2002, but lacks some of Dolphin's smoothness due to the hardware complexity differences.

So, while both emulators are easy to set up and run a large portion of their libraries well on modern PCs, Dolphin just edges out PCSX2 in overall emulation quality because of its less demanding nature.