I bought 360 of these co2 canisters. These work well and carbonate just as well as ISI brand, but in my ISI carbonation device (water jug with cannister puncture and wand) I have to place a small zip tie in device as the overall length of the whipit vs the ISI is just a hair smaller, maybe .5mm. Still works fine, just another extra step to do when I make my carbonated water. The taste difference, if there is one, is negligible. I am unable to tell a difference from whipit vs ISI.
I am not sure if there is a standard for overall length of co2 cannisters, just know the easy whip one is slightly smaller than an ISI.