The Bally widebodies are classics more so in terms of the art than the gameplay. Embryon, Paragon and Future Spa being the best. Hot Doggin' was ok but definitely not on par artwise. Space Invader is cool looking but easy like its skinny bro Silverball Mania.
If you want fast and unique play out of a early SS, then you need a #Black Hole, Volcano, Devil's Dare or #Mars God of War. Each one plays and shoots differently, you didn't see the playfield layout rehashes with Gottlieb in this era.