That tank is also compatible with TFV8 Baby Beast coils, which would also make a plethora of other coils available for use as well if you're interested in trying out others.
Compatible coils that are applicable to the TFV9:
View attachment 945621
(I don't know why some of those are on there twice, but w/e)
Personally, I do not own a Smok tank, so I have no basis for judgment on how it compares. I do however have the Valyrian II and Falcon King which have often been compared to Smok's subohm performance. If you're looking for tanks that are tried and tested true for long lasting coils, the newer GeekVape Zeus Subohm (Z-series coils) and the Freemax Fireluke 3/Maxluke (904L X or M series coils) both have extremely good flavor/clouds and long lasting coils (3+ weeks reported by many). Both also blow the Valyrian II and Falcon King out of the water (imo) and have recently been seen on sale for around $15-20ish, iirc. I vape at 70/30 VG/PG and have had zero issues with wicking or performance from either. The Zeus draw is a bit cooler, and the Fireluke 3 is a tad bit warmer if you decide to go that route.
A variety of TFV8 Baby Beast coils if you're looking to try something other than 0.15 coils, but sticking with Smok.
View attachment 945623
I apologize that this went a bit off topic, but I believe coil resistance and wattage plays a big part in preferred performance.