If you can't ask a store owner, who CAN you ask? LOL

You want to make up your own mind, find a store that has all of them... Bit impractical, TBH, though. I'd rather ask someone who has BOTH (or all) side by side.

Bottom line is, it's pretty easy to crank a system until it audibly distorts, then see if another system is louder or quieter by the time IT distorts.

All of these systems are small subs with small speakers on top. Seems a pretty fair comparison, and they all come in at roughly (within a few hundred dollars) the same price.

There's no need to get utterly anal about it. Any music (doesn't matter what, as long as it is balanced) cranked up... Does it get brittle, does the sub flap, does it stay clean at high volumes, does it cover a wider area..? Probably most of us would test the same things in the store ourselves. Most anything made nowadays can sound good up to a certain point. But what many of us would like to know is, where is that point? Which one stays cleaner, longer?