I'd never heard of Styx (I'm not American), so I looked them up. Here is what they (or a Styx acolyte) say about themselves on Wikipedia:-
"They are best known for melding the style of pop rock and hard rock with the power of a hard-rock guitar balanced with acoustic guitar, synthesizers mixed with acoustic piano, upbeat tracks with power ballads, and incorporating elements of international musical theatre."
Snappy, no? Another way of saying, "We are not particularly distinctive." And so it proved on listening, to me at any rate! Very competent and a good live act, obviously, but anything less like their name, it's hard to imagine!