I was in Amsterdam this summer. Hard to tell what the most potent stuff I smoked was, because compared to the average Dutch potsmoker, my tolerance was shit. Every single time i smoked, I underestimated the weed and got so incredibly fucked.
I'm recalling all of this from my hazy memory of those few days there, so this might not be totally accurate.
First stuff I tried was Thai Weed. God damn that shit was so good. It was this dark dark green and redish sort of color, really sticky, and smelled soooo good. I hadn't had much sleep so this shit just knocked me on my ass. VERY psychedelic weed though . . . the music the guy in the coffeeshop was playing just sent me to another world.
Then I had some White Widow, kinda neon-greenish, lots of crystals. A much more uppy high, but as I said, I hadn't had much sleep before the Thai. Lots of giggling and smiling. Not very 'trippy' weed, but lots of fun.
Northern Lights was the shit though, again sorta neon-greenish, but a lot more crystals. This was sort of my perfect mix of giggling and 'tripping'.
White Rhino was VERY VERY good, but made me extremely paranoid every time I smoked it. I'd say in terms of strength, it was the best stuff I smoked, but the paranoia detracted from it for me.
In terms of appearance, taste and smell, the Thai Weed was my favorite. I smoked so much of that stuff . . . . mmmmm, tasty