No, the vertical settings appear to be the same - this suggests that signal levels are different, i.e. the output from their gadget is higher.
Probably, but it no longer a fair test to show rise time and jitter if the amplitude/time ratio is not constant. It is irrelevant if it is due to scope settings or signal amplification.
No, the sweep time appears to be the same (5ns/division - the figure in the top left). You would see the same effect on the trace if jitter was present in the second signal.
R. -- http://robinbowes.com
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