You can use either form of nicotine, in anything. The higher ohm's coil well it might make sense to use nicsalts than the other coil-- provided the vape from your "other liquids" isn't too harsh for you, and that would mean that you might be better off using nic salts and/or a mix of both types of nicotine if you want to get to very high levels. With that said, everyone has different sensitivities to nic harshness and different amounts of nic they want to vape. For example, if your typical juice that you have is say 12--26 range and it's okay in other devices for you I'd be surprised if the 1.0 coil would give you any more trouble than another other coil.
The lower ohm coil, well it would make sense to lower your nicotine (maybe) but equally, you don't have to use nic salts OR freebase either, you just have to be sure that your nicotine level is tailored to the device, for example, 6 mg./ml with either type of nic.
I kind of think there's this unholy marketing thing going on (thanks to the juul perhaps) where every pod maker wants to have a coil "designed" for nic salts so they feel they can compete in the market.
I really dislike it. I think it's fine to indicated that one coil will likely be better for nic salts IN HIGH STRENGTH, than a more sub0hm one, but to get into saying "Nic salt capable!" or "Specially designed to handle nic salts!" gets into the arena of LYING. There is no special "nic salt only" coil that dissolves if you use freebase on the market. Period. There just ISN'T.
There is only, 100% tailoring your nic level to your device, and if you need or want much higher nicotine mixes, nic salts are a good option.
But the pod nic salt feeding frenzy makes me annoyed. While some pods may well be designed to incorporate nic salts, like the Juul, well even them if you reuse the pods you can use freebase.
It may well be you WANT to try nic salts in them but you don't have to. Period.
Sometimes I think it may be a safety measure in the sense of "We don't want you vaping your bottle of 40 mg/ml nicsalts using the 0.6 coil, that will be unfortunate!" However, given the statements made, I really think it's a marketing gimmick and it's one that causes a lot of confusion.
Anna