Not abnormal...
Compare coils
Example:
A 2ish Ohm coil using AWG 34 could be made with something like 7 1/16" wraps.
A 2ish Ohm coil using AWG 28 could be made with something like 14 1/16" wraps.
As you can see, the 28 gage build uses twice as much wire, so you have twice as much coil to liquid surface contact, so it's going to use more liquid.
Wick type can also make quite a difference.
It's probably possible to tweak the KayFun for similar liquid use as other tanks.
1. Set the air flow to one similar to the tank you wish to emulate.
2. Make a similar coil.