Pappy said:
^ Same make, different models. That's the way God made us (if you believe in God).
Amen, brother.
Pappy, I had an after thought. Again, no idea if this is of any value, but just fwiw you might give this a try, if you haven't already . . .
Put a GonG adapter at the end of the whip, attach it to the down stem of whichever glass piece has the least resistance, add just the minimum amt of water, set the Q on 200c and turned on Fan 3. This minimizes the differences between whip vaping and bong ripping, and so gives you a reasonable baseline. I measured the exit temp from the whip at ~80F (the temp drops exponentially over whip length), and with the fan pushing you shouldn't really need to "rip", i.e., use only what little more than normal breathing pressure is necessary to move the vapor thru 1-2oz of water. The vapor density should be the same, a function of the fan. This may enable you to experiment with differences in inhalation path, route, and depth given that other variables are held relatively constant at a minimal level. And you can experiment with those other variables, too (e.g., dropping the fan speed down will progressively increase how hard you must pull). Anyway, just a thought.
Again, good luck - and do take care.