Plus, I don't think Apple has really released a "Pro" M1 laptop yet. The current M1 MacBook Pro has max 13 inch screen, max 16 GB RAM, max 2 TB storage, only 2 Thunderbolt/USB ports, only a single external display supported, no external GPU supported.
If I had to guess I'd say they meant to call this just MacBook but tacked on the Pro since they discontinued the non-Pro line entirely.
There can be no real pro M1 yet, I don’t have that much issues with the 16GB limit tho some might people might but the other limitations are really due to SoC itself it doesn’t have sufficient bandwidth to support external GPUs multiple displays and a lot of high bandwidth peripherals.
My own personal theory is that the M1 was not originally designed for laptops it think it was originally intended as an iPad Pro/Pro+ SoC to compete with the higher end Surface devices. This is why likely external GPU support and bandwidth for peripherals wasn’t prioritized, its more than enough for a tablet.
I’m not sure if Apple really expected to get that much performance out of it from the get go, when their early samples did they made a decision to launch a full line including laptops despite the rest of the SoC not being designed for that.
The 13” MBP line has been bifurcated for a couple of years, the M1 replaced the low-end of that line.
The split started when Apple first tried to replace the MacBook Air with the MacBook Pro sans-touchbar (aka the MacBook escape), and the low end Pro hung around even after they reversed course and brought out the new retina Air.
If I had to guess I'd say they meant to call this just MacBook but tacked on the Pro since they discontinued the non-Pro line entirely.