Different sound volume between 1.3 and 2.0

1. Open attached score (produced in 1.3) in both 1.3 and 2.0.
2. Load FluidR3_GM.sf2 in both versions.
3. Delete fluid.sf3 from 2.0.
4. In 'Master Effects', change the entry in 'Effect A' to 'No Effects' in 2.0.
5. In 'Play Panel', increase volume to maximum in both.
6. Play and compare them.

Result: The volume of sounds seems different between versions. For example, the Electric Bass sounds more audible than Keyboard 2 in 2.0.

Note: I'm not sure if I'm able to provide accurate audio uploads of them - due to this: #21592: Exported audio doesn't play loaded soundfont

Using MuseScore 2.0 Nightly Build (06153cf) - Mac 10.7.5.