When you inject 200mg (or whatever amount) into your muscle you are creating what is called a depot, basically a storage unit. Although it is a time release, your levels will be as high as they can become from that shot within 48 hours. They will fall to about half of that steadily over the next 5 days. so 24 hours or so after your injection is your peak T levels. The day before your shot is as low as they will fall, since you will be bringing them up to peak again with your next injection, this is your trough.
The goal is to keep T levels within eugonadal range the entire time. With 1 injection per week it will almost certainly peak above eugonadal range, or fall below in the trough depending on how much you shoot.
By breaking the shots up 2x a week you will see a completely different graph of your T levels, they will not go as high, or drop as low.
doing 100mg a week IMO is useless, the human body can produce up to like 90mg a week, and thats pure test, no ester.
Of your 100mg of cypionate 30% is ester weight, so your really only getting 70 mg a week.
It doesnt end there, it is impossible to compare these numbers directly, since your testicles keep a constant flow of T going to your blood stream, its impossible to replicate that with an IM injection. They think they can do it with the pellets but there is a host of other issues with them.
IMO 125mg a week is the lowest i would ever go. i might even up my Human Chorionic Gonadotropin (HCG) to 750iu a week with that low of a dose, that will add to your T levels as well. Once T is released into the blood stream it is only active for 10-60 minutes.