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Disneyland early opening is called Magic Morning to those who have bought a 3 day or longer ParkHopper that offers it. (Most of them do). At the exact same time and days of the week, the Disney Hotel guests get the "Extra Magic Hour" at Disneyland, so it is a shared experience.
The DCA option on the other 4 days is a Disney Hotel exclusive. (Extra Magic Hour)
And while they are typically offered on the same day of the weeks, special events can force the switch on some days, such as a Marathin weekend, the CHOC Walk, etc. for logistical reasons. So check your specific dates of visit to verify which park is opening early.