Follow the headline link for Michael Potuck’s head to head to head to head comparison of the four current MacBook Pro models (the still-selling Intel model, the 13″ M1, and the brand new 14″ and 16″ M1 Pro/Max models).
At the very least, scroll through the various tables to get a sense of what has changed, including things like external display support, built-in display brightness, and battery life. Lot’s of great detail here.