Choice between OC20 and Morphine 15's

[weekender2]

Question for SWIY'all: Suppose SWIY had a ready, trusted, WAY below retail source of 20mg Oxy's - enough to support a recreational habit with ease. Further suppose SWIY had, as coincidence would have it, just as ready, trusted, and inexpensive a source of Morphine Sulphate 15's. The quantities of each are sufficient to the extent that, for the purposes of this question, there's no need to worry about a pill-to-pill equity, but that for the sake of self-control SWIY would only want one flavor of opiate in the house at once. Which one would SWIY pick, given the choice - and why?

Pax,
Weekender