GN, first off you were running really low wattage with the Cisco 3.5ohm atty. At 4.1v, you were running barely at 4.8watts. You're not going to get much of a "hit" at that level, but yes, you may more flavour overall.
Second, yes you will get a lot more flavour with more surface area (microcoil) compared to a regular coil with less wraps because the higher surface area would mean more juice being "cooked" by the coils thus creating more flavour/vapour.
This does not only apply to NETs.
NETs for the most part are notorious coil gunkers and we usually have to resort to cleaning/dry burning/replacing wicks every tank or two. This may or may not fit your style of vaping.
With regards to the Aspires, IClears, or whatever stock heads, I never was able to find one that worked to my liking with NETs or other juices. I always had to "adjust" them somehow to make them work, and thus I took to rebuilding my own coils. In short.. Stock coils do not work for me, period!
As for the Kanthal vs Nichrome question, you will have to try both and see what gives you your best solution. If you find you get better mileage/flavour out of Nichrome, then stick with it. Get a rebuildable dripping atty or tank system and get Nichrome wire to build your microcoils. Cotton or Silica for your wicking medium.
Life is complicated enough, and if you find something that works for you, apply the KISS methodology and use it.
For me, I have achieved my Nirvana using a Kayfun Lite with a 12 wrap of 28gauge Kanthal at 1.7ohms wrapped around a 5/64 drill bit. I use primarily NETs at 70/30 PG/VG from a couple of different vendors.
I was going to reply to GN's post, but this answer pretty much covers everything I would have said, plus more. Great post Dusty.
It's a mystery to me, but with Kanthal and Nichrome, some time one works for someone and the other not at all, while most seem to not notice a difference at all. For me, Nichrome just doesn't work, it mutes and adds an odd flavor that it doesn't for most others. I think some of us are just sensitive to the composition of one or another. R41 does about the same thing as Nichrome with me, though for many others that expensive wire is a godsend. All this means to me is I stick to Kanthal.