KH Fans - did I choose poorly?

I tried KH for the first time, picking up a 80 of the 20mg lemon head thai, 80 of the 18mg strawberry, and 10 of the 60 caramel sundae.

The caramel sundae was great, good taste and effects.

The other two were "duds" for me. It was my first time with those type of thai tabs, but the strawberries were also ineffective.

I know stores get their tabs from different manufacturers - Did I pick the wrong types? Which are the ones that are like those caramel sundae since I know I respond to those but don't usually get large tabs.

(to be clear, I didn't mean I was comparing 18mg vs 60ms - at same dosing the effects were minimal for me on strawberry and lemon)