I know many people on here have switched mid cycle between the two. They most likely found better gear of either or and decided to go with the other mid cycle. I know that due to the long esters in each of these compounds it generally takes 4-7 weeks to fully kick in ***ending on the person. My question is this....if you start a cycle with cyp and after your first two weeks are thinkin' about switching to enth because the quality of the gear is better, the cyp will not fully be into the system. If you decide to switch to enth starting in the third week, do you have to wait longer for that to kick in since it is a new compound being introduced to your body? Or are the esters similar enough to where the enth will basically just be taking place of the cyp and you wouldn't have to wait the full 4-7 weeks to fully kick in? I hope this makes sense lol...it did in my head when I thought of it...