Yes. It is all the same. The only things I find a little different is the things are not as linear. The electrical laws don't ever change, but more watts doesn't mean better necessarily. There is so many other variables that you can't plug into calculators, such as, atomizer type, airflow, wicking material, coil size and placement, juice PG/VG/Nicotine ratios and your individual taste!
Here are some of the calculators I use:
http://www.steam-engine.org
http://coiltoy.ermeso.com/
http://www.ohmslawcalculator.com/ohms_law_calculator.php
There are also android and iphone apps too!
Good luck, keep reading, and ask questions! There are a lot of smart, and experienced people on this site that will always be glad to help. I can only hope to have a small portion of the knowledge of the people here some day!
Welcome to Vapor Talk!