This is a good forum and im not trying to hate on you, but there are plenty of kids and inexperienced individuals who come here asking for advice on anabolics when they arent ready. When someone comes saying theyre doing a cycle and already asking about the basics its gives red flags.
What made you decide on those Tren and prop doses? You're only dosing 150mg prop a week, and the tren is even higher than the test.
The difference youre seeing in PCT start times is based on the ester attached to the compound. Enanthate, Cypionate, undecanoate, etc. all have longer half lives, therefore the time post last injection is longer with them before PCT. Acetate and propionate esters are faster acting so PCT should be sooner vs others.