@Randy B. Singer
Congratulations on your ability to discover the features of various different printer models, as I found such information was almost like pulling teeth ...
Much earlier in my life I was in retail sales. I can tell you that a huge company like Canon, that sells their products through several different channels, DOES NOT WANT you to know the differences between all of its models. That's because a big company makes different models, all slightly different (the differences may be only cosmetic, or they may be very important, but invisible), for different channels, so that they aren't competing against each other.
So, Walmart has its own dedicated model that no one else has, built to a (low) price point. Since no one else has the same model, Walmart can both advertise that they have a genuine Canon printer at a rock bottom price, without also having to worry about competing against anyone else who sells Canon printers based on price.
There is likely a special model for online resellers, and a special model for stand-alone computer stores, etc. Since each of those channels has their own model, they have little or no competition to get into a price war with. In this way, Canon can flood the market with product, yet not create a disincentive for retailers to want to carry their products. In the business, this is called "protecting your channels".
Note that Brother does something slightly different. They too have lots of models, but their Web site allows you to compare their features easily. They aren't hiding anything. Any channel, apparently, can choose to sell any of Brother's models, but since their are so many models, and each model has important valuable differences from any other, and each model is priced differently from all the others, retailers can choose which model(s) are appropriate to carry for their targeted customers. This approach works out rather nicely for consumers. A discerning customer can choose the model that is just perfect for them based on features and price, if they are willing to invest the time and effort to figure out which model that is.
So, yes, it took me a very long time to figure out which one of Canon's models was the spiritual successor to the much-loved MX922, while still being sold at a reasonable price. Without someone like me doing that, your average consumer wouldn't have a clue. Canon has models that are sort of like the MX922, but which are more up-market, and they have models that are sort of like the MX922, but which are more aimed at business consumers and less so at photographers.
This is not to say that these practices are evil, or even bad. It's business. This is what companies have to do to be successful. I remember that at one time, many years ago, Sony started selling the same few consumer products to any channel that wanted to carry them. You could buy a Sony car stereo at your local drug store. That created a huge price war between all retailers, and suddenly retailers all together decided that there was no money to be made selling Sony consumer products. Overnight next to NO ONE wanted to carry Sony products anymore. It almost killed Sony.