Yeah, it's just the age. The first ones called Mark I towers, also referred to as good space shots have just the cable on top of the gondola and it launches the car above the top of the cylinders giving a great pop of airtime and a few feet of true freefall before the cables catch the car again.
The Mark II have a full loop of cable and the cylinders that span the tower top to bottom, generally they're nowhere near as good as the older Mark I's, though some of the older ones are no longer being run quite right, I guess they've messed with Big Shot on Stratosphere but can't confirm, the one on I Drive in Orlando which is the relocated prototype, last time I rode it was running very poorly, then the cedar fair ones are hit n' miss.
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder
Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping
Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073