Actually, I'd argue there's another option, which is the I use 75% of the time with a gas stove and 100% time of with any form of electric stove (except the Samsung-style induction units I mentioned).

Step 1: believe that the controls are consistent and reasonably accurate Step 2: learn what control setting corresponds to what level of heat

The biggest problem with this method is that it can take a while (for me, perhaps on the order of a year or two). At this point, with my current gas range, I don't need to look at the flame - I know that half-way between "medium" and "medium-low" is just what I need for the current cooking task.