the 5 min HP egg(s) with IR ( instant release ) has 60 % ( a little more actually ) more time at HP than a 3 min HP egg with IR
the results ( pictures ) would be reversed if I understand thermodynamics even a tiny bit.
natural release just adds a variable cooking time on the addition side of the equation
I am not in anyway doubting @blue_dolphin work
in addition, it would take more time ( probably not that much more ) for the IP to get to full pressure w 1 doz eggs
above the water ( think of them as a cold mass absorbing heat while the pot gets to pressure )
rather than 4.