Document reasons for when/why to use RTC Alarm vs esp_sleep_enable_timer_wakeup to wake up from deep sleep?

[fiendish]

https://soldered.com/documentation/inkplate/5v2/low-power/deep-sleep/ explicitly mentions esp32 timer and button wake-up, but it also links to an example using an RTC alarm without explaining why someone would use one vs the other between the simple deep sleep https://github.com/SolderedElectronics/Inkplate-Arduino-library/tree/master/examples/Inkplate5V2/Advanced/DeepSleep/Inkplate5V2_Simple_Deep_Sleep and the RTC alarm deep sleep https://github.com/SolderedElectronics/Inkplate-Arduino-library/blob/master/examples/Inkplate5V2/Advanced/DeepSleep/Inkplate5V2_RTC_Alarm_With_Deep_Sleep/Inkplate5V2_RTC_Alarm_With_Deep_Sleep.ino