I will give you our findings. There are differences and I'll explain.
In and "old style" element rangetop, there are 2 sizes, 8" and 10"/ 12" elements. The 8" elements pull about 1,200 to 1,500 watts, while the 10" / 12" pulls about 1,800 to 2,200 watts at full power on high.
In a newer style glasstop range (like the on shown in your picture) many burners have different size elements which allow different sizes and wattages, but on full power they are about the same as the old style elements.
Now here's where it gets interesting. Most if not all that I've seen of the portable induction tops are max 1,800 watts on the high setting, but what people don't realize they will use about the same power as a conventional rangetop. Here's where it gets interesting. The old style and newer glasstop cycle the burner on and off to maintain the temperature, but the induction is a bit more steady (does not cycle the burner on and off). The induction cooktop heats much much faster and we've done the test of boiling water and the induction boiled the water in 1/2 the time. On and induction cooktop you will cook much faster but the electrical usage will be about the same. Cook time is the savings here. The burner area on an induction cooktop is also much cooler.
Now to explain how we arrived at our conclusion: When I was building BAB's (aka the Battle Cruiser) we went away from a gas stove and went to induction cooktops (two of them) and conducted all these tests while we were still living on our old house. Induction is far superior and requires pans made for induction, but we see that as a good thing.
Our thoughts? We were so impressed by the induction cooktop we bought a brand new slide in induction range for the barndominium.