For 99% of modern users, highly compressed GameCube ROMs (specifically in RVZ format) are the superior way to emulate. You lose zero visual or audio fidelity, you save massive amounts of disk space, and with modern hardware, you lose no performance.
Choosing the right format is critical for balancing file size with performance. gamecube roms highly compressed
However, "compressed" does not mean "lossy." You do not want to lose cutscenes or audio quality. You need tailored for GameCube discs. For 99% of modern users, highly compressed GameCube