The VG Resource

I'm currently uploading sheets with higher quality faces from the Urbz: Sims in the City (DS).
Should we delete the Character Portraits from Urbz: Sims in the City (GBA)?

No. They're two separate games, so they're different sprites. We keep them both for the same reason we have Super Mario Bros 3 on nes, snes, and GBA.

Yeah, what Ton said. If you were replacing poor quality sheets with better quality sheets from the same game (meaning the same title on the same console), then yeah, we'd delete the old ones. But, even in the case of ports of the same game for different systems, they're technically different games so each gets its own section.