The MSRP of the RBH SX-8300 is the same as the Revel F208 -- $5K/PR.
Basically each SX-8300's trio of 8" aluminum subwoofers is about equivalent to a single RBH SX-1010 subwoofer. And since you can actively bi-amp the SX-8300, the bass will be extremely similar.
Of course, separate subs and bigger subs will unequivocally produce more SPL and deeper bass. But in real life situations with movies and music, a pair of SX-8300 actively bi-amped via
LFE/Dynamic EQ/Ext Amp will shake and rattle the 4 walls of a 18' x 20' x 12' room like a rag doll and still produce tight musical punchy dynamic bass like the bass from a high-end tower speaker.
Not everyone wants a subwoofer. Hard to believe, but true.

A lot of people just want the 2 towers.

But most towers will not be able to produce the kind of bass like the SX-8300 because the SX-8300 can be actively bi-amped.
The Salon2 can go down to 23Hz. But the Salon2 cannot be actively bi-amped. Thus, the SX-8300 actively bi-amped via
LFE/DEQ/amp will produce significantly punchier and musical bass IMO.