Nothing beats the patch for consistent delivery. With vaping I have it more in bursts.
It's possible that's true about absorption. I wonder if maybe more nicotine is wasted vaporizing because you breathe most of it out or something, or maybe I'm not breathing deeply enough, but with the method of vaping that makes me most comfortable I "use" >3x the mg of nicotine I had before, 4ml of 6mg/ml strength juice a day compared to one 7mg patch.
I would say the patch is more consistent throughout the day, and the vape is easier to adjust throughout the day. Both are effective.