The Tibs effect was good. As soon as customs heard that name, they fell all over themselves getting the FT pseudo-ersatz Air coils into my mailbox this afternoon.
The box is either authentic or a good knockoff. The coils? smaller air channel.
Results, so far...(more once they are really well soaked, and keeping in mind that they are replacing coils with lots of ml on the odometer...)
1. Tested on a M- I usually keep the AFC ~90% closed, now I have it half open for similar air flow and vapor output. No big deal...set it and ferget it.
2. Reduced wattage from 7.8 to 6.7. Ohms read 1.5 before and after coil change, but the new coil needs lower volts/watts. Why?
3. Flavor--this is key for me-- No apparent difference after adjusting wattage and air flow.
4. Whistle? None before coil change, none after FT coil installed. For comparison, I just vaped another iStick 30 with an eleaf coil, similar watts, AFC open about 15% to 20%. No whistle, but louder air flow sound, and looser, easier draw.
Provisional verdict: Whether from habit or other subjective cause, I prefer the eleaf coils because I've grown used to the very easy, airy draw. After a few days with the FT coils, I may or may not like them just as much. For now, I prefer the eleaf coils.
Would I buy FT coils again? Too soon to say. I'll let you know in a few days.