Do you know what is the same rate for the Vantage ultra? Because I figire 50 microsecond was the sample rate fastest.
Pico goes down to 100 Nano/seconds per division for sweep/ time . Sample rate is how fast the tool can read the signals it receives , sweep is not the same as sample rate, sweep is just how much time is on the screen not how fast the tool can read the signal. For example lets take a signal and to make the math easy happens in 500 milliseconds if your sweep rate is set at 5 seconds per division you will not see the signal without changing the sweep to 500 m/s per division. The glitch is still there you just can't see it because the signal is to fast on the screen, but if the signal happens too fast for the signal to be picked up by the scope, that is were sample rate is important, so if the glitch happens outside of the range of the scope to see it, it will never show on the screen, no matter how fast you set sweep. Keep in mind that the snap on scopes are plenty fast for automotive work and in some cases the buffer on snap on is better than the pico, the buffer is how the system records the signal.
A Scope reads Voltage over time, the time part is the sweep. Sample rate is how fast the tool can see the signal so the faster the better for scopes but in Automotive we do not need a super fast Scope. Pico comes from other industries that is why it has a faster sample rate
Vantage Ultra/ Verus Pro have a 6 Mega/Samples per seconds in a single channel the more channels you use the slower the same rate.
The Pico is 80 Mega/ Samples per Seconds in 1 or 2 channels in use, 20 MS/s with 3 or 4 channels in use over kill for auto repair, but an awesome scope