May be a different batch as you're in US. Would compare stamps when more of these shells arrive, seems to be all those and Mastercards at the moment. The Yellow Shells are the oil BP Logo.
I've been taking MDMA since about 2010 but not pre-drought, since all the qDances and all the great pills of this time though. There has been times I've gotten 'safrole' MDMA and it's been a darker more golden colour, definitely difference in effects to the point were I would take different batches saving it. No comedown, would dance to anything (including radio/taxi music), much cleaner more profound loved up feelings.
For those having trouble, I find MDMA crystal is best although it's more cut so harder to find a good supply. If you get a good supply though then weigh your doses out you'll have a much better time. The spread in pills these days will vary more (even by 10-20mg is a difference if anyone takes psys) and sometimes isn't suited to your tolerance.
There is definitely a difference, same with the different amphetamines, types of ketamine R/S, anyone with long, heavy poly-drug experience should know this or else just look at chemistry. It's like cooking, you make the same dish but different ingredients it comes out pretty much the 'same' but different taste/effects. I now save MDMA for occassional times with top quality non-safrole crystal but it does the job and wait...although not a big heavy MDMA user anymore.
Also with all these pill team lab busts etc surely there is going to be a bit of a drought compared to past few years when everyone has had it.