I haven't measured it, but I'm expecting it to do better than daily. Why?

Because, again, price can fluctuate a lot, even throughout the day. The price can drop 10% in the morning, recover by the evening, but your daily DCA might trigger only in the evening, so you miss out on the cheap sats from the morning.

Hourly DCA, I think, gives you the best average buy price, out of all the options available (i.e. daily, weekly, monthly).