They're not really the same, but I was comparing the two as means that persons learned to take advantage of things.
Inducing a snap roll is easy -- controlling it, and exiting where I want, is not easy, at least for me.
Because P-38.
You want a single engine aircraft for snap roll tricks. The P-38 likes dual throttle flat spin tricks.
I would try to pull the move off, but on my end it looks impossible. I wouldnt even know where to start.
A snap roll is caused by a loss of lift on one wing. The lift on the other wing rolls the aircraft. You can snap roll with or against the propeller rotation. Consider a 10,000 lb aircraft in a 4g turn. That's 40,000 lbs of lift, call it 20,000 lbs per wing in a simplified explanation, now you lose lift on one wing and the other wing has a 20,000 lb force rolling the aircraft. In level flight it's only a 5,000 lb force but you can still see why it's called a snap roll. If you want to maintain a snap roll you can add aileron to the roll.
To initiate a snap roll just yank the stick back, pushing and holding a rudder pedal forward will add yaw. You can push the stick forward for a negative snap roll. Moving the stick into a corner rather than straight back will increase the roll. Film and smoke or trails will help you see what's happening.
The prohibition against snap rolls in pilot manuals mentions altitude loss and possible airframe damage. That doesn't mean that an ascending snap roll with sufficient momentum will cause altitude loss but you'll certainly see a speed difference.
