Hi.
It'll be the "true" sound of the cab that You'll hear, much closer to what the audience hears. Whether that's to Your likin' or not, that's an another matter alltogether

.
An another + side of elevating an instrument cab is that if there's a PA, the stage volume will be more manageable and the bleed to the other mics will be reduced.
When ever I play in a small place, an elevated SWR WM10 is our monitor while the PA beefens up the lower register.
Regards
Sam