The only reason I see for going Sub Q would be at TRT doses, and you are injecting into fat.
It's working better for me, and the dispersal of the Testosterone is slower, so it aromatizes less. I use a 5/7" 27g 1ml needle, and compared to a 1" 23g 3ml needle, it's easier for me. I pin every 3.5 days instead of every 7.