The effect is different. And I'm sure they could be stacked but be careful with that.
The thermogenic effect is way way stronger with adderllin as well. Adderall makes my cawk small while adderllin does the opposite, lol.
Both can make my eyes dilate for sure though. With all these drug/supps people will get varying reactions. My GF Melohh took adderall once and said she didn't feel anything. People have said that about adderllin too. I think people probably are just very focused but aren't aware of it.