On the Roswell site, they list a Aquatone 6.5 Pro HLCD and 7.0 Airborne HLCD. Under the description, they both are listed as using a 6.5" HLCD. The difference looks to be that one uses a round horn flare and the other is a rectangle flare. The 7.0 lists having a 35mm compression tweeter with titanium membrane, where as the 6.5 lists no specs on the HLCD tweeter.
Given that both look to be a 6.5" HLCD, some things will be a given. Both will lack mid-bass to balance out the aggressive horns. If the 7.0 has a larger horn, it will be be even more harsh. With the right power, they will be loud for the rider at the end of an 80ft tow rope. Near-field, these will be not so pleasant as compared to a coaxial or larger HLCD.