While we have seen the M1 Pro and M1 Max specs during Apple's Mac keynote, it appears that Apple did not talk about cut-down versions of these chips, featuring fewer CPU or GPU cores, as well as different amounts of unified memory, depending on the SoC.
14-inch Macbook gets cut-down M1 Pro
The cheapest 14-inch MacBook Pro 2021, starting at $1,999, comes with a cut-down version of the M1 Pro SoC, featuring an 8-core CPU, with six Performance and 2 Efficiency cores, and a 14-core GPU. This version of the M1 Pro SoC also apparently comes with 16GB of unified memory, rather than 32GB.
The M1 Pro specifications, which were seen during the keynote, have detailed the 10-core CPU (8 Performance + 2 Efficiency) and a 16-core GPU.
The memory specifications for the 14-inch MacBook Pro are also interesting as well, suggesting a standard 16GB of unified memory, which is configurable up to 32GB, for M1 Pro and M1 Max SoCs, or 64GB for M1 Max.
According to what we could gather from Apple's own website, the cheapest 14-inch Macbook Pro 2021 is available with M1 Pro with 8-core CPU/14-core GPU, M1 Pro with 10-core CPU/14-core GPU, M1 Pro with 10-core CPU/16-core GPU, as well as M1 Max SoCs with 10-core CPU and 24-core or 32-Core GPU.
The 16-inch MacBook Pro 2021, starting at $2,499 and going up to $3,499, will be available with a couple of options, M1 Pro SoCs with 10-core CPU/16-core GPU and M1 Max with 10-core CPU and 24-core/32-core GPU versions. It will also be available with 16GB, 32GB, or 64GB of unified memory.
This means there will be a couple of versions of both the M1 Pro and M1 Max SoCs, so Apple made a big mess, and you should pay attention to the SKU that you are ordering.
Apple also has several different USB-C power adapted, depending on which SoC powers the new MacBook Pro, so you are looking at 67W one fo M1 Pro 8-core CPU SKU and 96W for the M1 Pro with 10-core CPU on the 14-inch MacBook Pro, and a 140W one for the 16-inch MacBook Pro.
You can check out more details over at Apple's Macbook Pro specification page.