This is what I found when I searched as well. Couldn’t find more than this (was hoping to find an actual research paper with detail).
I made this error last time. Perhaps it is, but I wouldn’t assume so. The study I am referring too was also summarized in an article by T-Nation (John Crisler method). It claimed 20% higher Test levels doing SubQ. I thought great, no brainer. Then I heard all this stuff in the forums about IM being better for Test levels. So I went back to the T-Nation article, and read it carefully. SubQ twice a week, IM once, measured at the trough.