The term "Hoppe style" has been kind of commandeered by AZBers to refer to any cue with a sort of wide Ivory (or imitation) ring near the butt cap - but they haven't been building cues for 30+ years. When I first started, "Hoppe style" meant no bumper and an exposed weight-bolt head. THAT really was the distinguishing feature cuemakers in the 80's emulated when they built a cue that had what was called a "Hoppe butt".
These days we see all kinds of "Hoppe style" cues that are nothing more than the particular cuemaker's same-old-same-old cue, but with a wide Ivory/white ring near the bumper. I personally still think the bumper-less buttcap is the real defining feature for that style...
TW