I agree with David, try it both ways and decide what works best for you. I tend to run at high wattages on atties with a lot of airflow (around 50-60W), and if I use contact coils, my juice tastes burnt. I was getting that burnt taste even at much lower wattages. So, for me, spaced coils are the winner. On the other hand, if I was vaping with something that had a much tighter draw, that didn't wick as quickly (like a stock Kayfun or a Taifun), then I might want to run at a lower wattage using a contact coil. I do know for sure that it's easier to make a spaced coil, just make a regular contact coil and instead of trying to get all of the coils touching, spread the coil out like a spring and then press it together again.
