I'll leave that up to you to research. But in the meantime, I'll give you one benefit/side between the two.
1. A starter injection cycle can last well over a 2.5 month span, while orals aren't normally ran over a month and a half (of course depending on the steroid).
BONUS
2. Orals are toxic to the liver. On cycle liver assist (and lipid assist) are needed. Injections, you don't need any cycle support for your organs
^^^Gave you a bonus so you can jumpstart your research. Enjoy :nervous: