A difference indeed.
Dual coils typically run at lower temperatures than single coils (ponder two 40 watt light bulbs in a lamp instead of a single 80 watt bulb) but they can produce a bit more lung hit at those lower temperatures due to more coil touching liquid to make vapor.
Dual coils can go through liquid a little faster if you still like to take long slow drags.
Dual coils can drain your battery a little faster. Make sure you're using a big battery with plenty of mah, preferably tested with the LR dual coils.
I think:
They're worth giving a try, especially if you're a big fan of 'lung hit'. I don't use them all the time, but I do have a few flavors that peak in this carto type, so I keep a box at hand. I've also enjoyed some of the jumbo ego sized dualies....good for flavors I know I like to vape all day...sometimes I can get a good week's use out of one if it's a clean clear liquid...2 or 3 days usually if it's a thick/sweet/dark liquid.
Credo