IMO Alot of Hardstyle does sound or have elements of Hardhouse.
I feel that there is two types of Hardstlye. You have stuff like Hardhouse, to me the Bouncy Bassline and Hoover samples etc. Stuff like Droid 'Rave Train' another good example is on the flip of 'Citizen - Taunus'
Ive lost alot of taste in Hardstyle hence ive not been buying alot of it so i dont really know whats out. But the other side i was talking about, the side i will buy, to me is stuff like - "High Voltage - Bombs Away" and "Quake - Raw Bass" also "Rapture - Deep Impact" etc etc
That to me is the true style, and the style that should continue to expand. But there is alot of shite out there, with very poor quality production and very Hard Housey. Not enough good Hardstyle out there and that is why im sticking to ma Hard Trance.