They have the same or roughly the same half life, cypionate and enanthate.
with testosterone I found testosterone cypionate and testosterone enanthate literally give me exact same results and gains, but cypionate is more painful to inject higher PIP. Not by much but it is more painful.
I see a lot of TRT done with cypionate but I dont see why. So I would pick enanthate for my test choice, yet many guys will swear by cypionate results.