Testosterone Propionate :

Molar mass 344.50 g·mol−1

Testosterone Enanthate :

Molar mass 400.60 g·mol−1

2 different Componds identified (LC-MS/MS, HPLC. Etc) by Molecular Weight (not ester)

which exactly test? depends on the ester. if this is test e for example, you get 70 mg or the active agent from each 100 mg. If 1 ml has 300 mg you get only 210 mg of pure testosterone, other 90 mg ensure slow release of testosterone from depo into your blood. 500 mg of pure testosterone enanthate is about 650 mg incl. enanthate ester.
Also dont forget about the half-life of each ester. If you need 500 mg per week, you wont get real 500 mg/week even if you inject 650 mg at once. Enanthate has a real half-life of about 4.5-5 days (depends on your methabolism). So say you injected today 500 mg. in about 4.5 days there will be only 250 mg in your body left.
If you split 500 mg in 2 days, say 250 on Monday and 250 om Thursday the picture is as follows. on monday you pinned 250 mg and by Thursday you will have a value close to 125 mg only. you inject 250 mg again, the total will be 250+125 = 375. In about 4,5 days you will have only about 187.5 mg. + 250 mg at next injection, it gives you 437.5 mg and so on. The amount of testosterone being in your body at a definite moment raises gradually.
If you need a high level from the very beginning there is a sense to load the double dosage at the first injection. Say not 500 mg, but 1000. In this case you will have 500 mg in about 4-5 days and the level continues to increase gradually. This will ensure high testosterone level from the very first week of your cycle.
Also take into account that about 98% of testosterone is bound by blood proteins (globulin and others). This means only about 2% of testosterone provide all the effects/side effects on your body. If you take proviron (as well as any oral steroids, but proviron has the most effective impact on it) simultaneously with testosterone it will decrease your SHBG level, which results in the higher level of free (not bound) testosterone = higher cycle efficiency (however, higher risk of side effects as well).

That it correct. TNE/suspension (both test bases but TNE is in oil and test suspension is in water) are both the exact amount of test as the mg/ml states ... Assuming they are dosed properly

Actually this is a huge issue for me. Especially when I have PM's from guys asking my opinion of their cycle or telling me how their last cycle worked out in such a way. For me, in order to give any advice I need to know what esters you are taking and in exactly what amounts. This gives me the details I need to give the most informed advice I can. I always take into account what is being taken as should any vet on here!

Perfect example is someone wanting to compare a Tren cycle asking me how they should run this cycle because last time they ran 350 a week for 8 weeks and now they want to run 700 a week for 12. You see the huge error glaring you in the face here? One suggest a Tren ace with a much much shorter half life but a higher concentration while the other suggest an enenthate ester with a much lower concentration. It is simply not apples to apples. But it can be converted to apples and then a good, proper comparative cycle can be calculated.

I get this all the time without people finishing the sentence and stating exactly what they are on!

Everyone just says how much they are pinning based on the mg/ml of the compound. No one (well, no one that I know about) bothers to do the math. It is understood the real amount is less.

Especially when you factor in that most ugl gear isn'twhat the label says. For pharma grade this would be accurate. Mist ugl have decent raws and if they compensated while brewing it could be close to the label.