Gauges and strobe are different methods, not directly comparable.
Strobe just flashes at point the system is active, analysis is the accuracy of markings on A & R mech and the TDC mark in relation to true top dead centre. The strobe "measures" nothing, it just shows you the position under dynamics of the engine and ignition system running.
Gauges on the other hand, have to be balanced, calibrated (ideally against a std reference) to be of any use. There's likely more inaccuracies in them, or potentially, than just doing a mechanical bench sync. they dont hold the upper hand in technical reference, just convenience. If you've a good set
