The 0.7 coil can handle a bit higher wattage and sometimes will go through more eliquid how that will affect your flavor IDK, I tend to favor the 1.6 coil but everyone's different.
Do you only want tanks that accept this coil? If so you have gotten a good list if you want other MTL tanks, the Innoken Zenith is nice, 4 ml capacity a 1.6, 0.8 and 0.5 mesh coil it gets good reviews for flavor as well as coil longevity.
How long a coil lasts is so subjective and based on how many factors, it's hard to estimate. I might try to go by mls vaped rather than days, it's at least more accurate.
A few other MTL coils of note, the Nicholas Vapefly, not my all time favorite MTL coil but I do put it in rotation.
The joytech CLR coil at 1.0 ohm is a very nice, durable, rewickable and recoilable coil head if you so desire. Great flavor longevity and vapor density. A bunch of tanks take it, of which I think the most well known are the Joytech Ego Mega tanks or the Tron Joytech tanks, but there are a plethora of other tanks (joytech or not) that will take this coil. If you are interested, well it has its own thread:
https://www.e-cigarette-forum.com/threads/ego-one-tank-series-–-clr-coil.697218/page-467
Happy vaping,
Anna