AO Smith absorbed several manufacturers, including State. The new units are rebadged as AO Smith, but they are still, more or less, units of a different brand.
The unit I bought shows a shipping weight 16 pound heavier than the one at Lowes. It's six inches taller, and, perhaps most significantly, five inches wider.
YES! I think we are speculating a LOT in this thread with no real data,
especially regarding AO Smith brands discussed in the video. AO Smith operates 5 U.S. plants, as well as global operations. Their umbrella includes GSW (Canada), John Wood (Canada), State , American, Reliance, Lochinvar, and U.S. Craftmaster. One site "claims" that the Lowes AO Smith water heaters are made at the Johnson City TN plant, not their main plant in Ashland City TN.
IF true, it might explain Lowes version vs. pro/jobber version. How much of the acquired name brand technology (I.E., Lochinvar) did AO Smith keep or abandon? How are we to know?????
Maybe Rheem is more vertically integrated and there might be fewer differences between box store and pro?? Bradford White has no box store presence to my knowledge.
FYI, Bradford White is available to the public at Ferguson, at least in Michigan. My gripe with Bradford White is that the anode rod is integrated into the hot water outlet making it more difficult to change. I bought our 2017 Bradford White simply because it's made in Michigan.
My internet research leans towards Rheem as the slightly better purchase choice of the three brands??? Also, contractors probably buy the most convenient brand, not necessarily the best.