By now, ive almost read all those freakin 6-apb threads on this site, possibly including something like 10,000 posts. Please do me a favour and keep this one informative and drop the chatter (6-apb vs. unknown chem; high post count vs. low post count; rc-leet vs. meph-kids; ect, ect, ect.).
Last interesting post was from mullered, his opinion was that the original samples came in two variations:
1st synth:
marquis purple
effects including nausea and visuals
2nd synth:
marquis dark blue/black
no visuals and less nausea reported
it seems reasonable that the pellets contain the 1st synth as they share the same properties. I vaguely remember that a while (and thousands of posts) ago, shambles was guessing something like the 1st synth was going in the pellets first and the 2nd synth would be following in later batches. (BTW it was pain in the ass to find that original post)
However, different synth does in no way mean different chem: the synth route only matters for the impurities that the finished product contains. It then seems that the 2nd synth has less impurities then the 1st one considering that the 2nd synth was reported to feel cleaner with less side-effects or residual stimulation. I lately had the occasion to compare old tan metylone vs newer white methylone. The color difference must be due to a different synth route. On the effects side, the old M1 batch feld a lot cleaner and had far less speedy jitterness on the comedown. On another note you must be aware that with higher doses, the potential side-effects tend to get worse. This is especially true for impure products. As you may remember, bad synthed MDMA sometimes presented toxic ipurities (like PMA) that caused severe hyperthermia among other potentially lethal side-effects.
For those HC-neckers that do Meth+Meph+MDAI+X on friday and 6-apb on saturday, keep in mind that you have badly depleted your monoamine stocks especially dopamine. In that case it is impossible to get any enjoyable effects out of entactogens a la MDxx or 6-apb besides feeeling monged-out. The same counts for taking MDMA on two consecutive days. The 2nd day you will feel more of the side-effects and less enjoyment. Man, let your Brain rest, and don't get the stupid idea that you just need a higher dose to catch the high!
Stay safe