I'm pretty sure that I did compare them to see the difference and they looked the same, but it's not a deal breaker for me, as long as the game is running fine that's all that matters to me.
As for the volume, I'll try your suggestion and see if it fixes the issue.
Btw, maybe you have some tips on how I can deal with Doodlebob & DoodlePatrick in Spongebob's house? I'm struggling a bit with that level in particular.