theoretically
well... without doing an excel spreadsheet to figure out when the saturation point would happen with those doses (the point when you're putting in the same about that is falling off from half-lifes every week), you could just run 6 weeks of each dose and drop $30 and order a testosterone test online ($30 twice). and compare the results.... but that won't tell you anything you won't already know.
more is better.
300 is 60% of 500mg. that extra 40% is important.
like comparing 600mg to 1,000mg, or 1,200mg to 2,000mg.
so instead of getting 8 weeks out of your bottle, you're getting 5. if you pay 40 a bottle, it's like paying $8/wk vs $5/wk. you WOULD pay an extra $12/month for better gains, better training, better sex, and better confidence, RIGHT?