During the sealant test from the UK a few months ago. Zaino AIO, Z-2 Pro and Z-5 Pro all lasted 4-5 months before the tester decided to stop the test.
These three along with Wolfgang Deep Gloss Sealant, Klasse AIO and Sealant Glaze out lasted around 50 or so other products. So Z-AIO is very durable.
To be honest I applied Z-AIO today, used Z-6 followed by Z-5 and I couldn't really tell that Z-5 improved the shine over the AIO.
So imo you could apply just the ZAIO and be pleased.
craigdt, answer to your question. I have use Duragloss fast clean and shine, Clearkote's QD, Optimum QD all with Zaino and never had a problem.