Test is test, IMO I prefer test C above all. I try, instead of once every two weeks, I prefer Tuesdays and Thursdays. Prop has its place,although Trt isn't it. At the beginning and end of a cycle makes more sense.
Test is test YES, however PROPINATE is not ENANTHATE, the esters do effect you biologically in different ways and it has been proven in a couple studies indirectly.
Test c/e have higher e2 conversion rates due to being longer heavier esters , which leads to more e2 sides (one can debate positives or negatives of them), as well as higher ft/dht, higher nitrogen retention etc, in theory its more anabolic due to the longer Ester.
Test p is healthier, safer and more natural. Why? It mimics diurnal rythym. Natty T levels fluctuate throughout the day, at 8 am it may peak at 800, 10 pm crash to 400, 12 pm hit 600, then by 6 pm hit 300. These constant fluctuations are actually healthy and normal as your body uses testosterone similar to adrenaline in fight or flight situations and responds as needed (for example your body does not require testosterone or adrenaline in your sleep as you are not in imminent danger, or hunting a saber tooth tiger, however if the need arose your body would give you/produce testosterone at that time of night if it required). Test c/e is like revving your engine at 8,000 rpms 24/7 day and night without ever turning off your car (that is depending on if you allow troughs or not). A constantly elevated t level has been shown to be neurotoxic specifically on the dopamine reward system. Test p’s spikes allow for that system to function like normal.
So yes, test is test, but enanthate is not propionate, and your body likes ups and downs and it is not natural to have a constantly elevated state.
(to op: you feel like shit on test c/e because you’re putting a constant stressor on your body that your genetics clearly cannot handle, be it higher Rbc, water retention, dopamine/norepinephrine)