Pitch of Bright Grand Piano (and others) is off by 2 Halftones in MuseScore_General[_Full].sf3
If I use the default soundfont MuseScore_General or MuseScore_General_Full, the pitch of Bright Grand Piano is two Halftones higher than the pitch of Grand Piano. If I choose another soundfont using the Synthesizer window e.g. FluidR3_GM, both pitches are identical. This also applies for other sounds e.g. Honky Donk.