I Think....
....One of the reasons GE had all that sales supremacy was the incredibly broad selection of wall ovens they offered.
It started with the Deluxe models, beginning with the JC 14, a 27" single-oven model without P*7. There was a double-oven version of this, the JC 25. Then came the JK 14, a single 27" oven with P*7, and the JK 25, a double 27" oven with an upper P*7 oven and conventional cleaning in the lower one.
After that came the Custom models, beginning with the 24" JR 19, a single P*7 oven geared toward the replacement market. Then came the JK 19, a 27" version of the same thing, then the 27" JK 29, which had two-count-'em'-two P*7 ovens. All these Custom models had the rotisserie and the electric meat thermometer.
That's seven different models, most available in five finishes - White, Coppertone, Avocado, Harvest and Brushed Chrome.
I know Sears offered more selections, but that counted gas ovens. And Sears' stuff was not the quality GE's was.