When viewed from above, there doesn’t seem to be a huge difference between the regular K60 and the Low Profile model. They have the same number of keys, packaged into a deck that’s the same

There are two main categories of keyboard you’ll be thinking about: mechanical and membrane. Mechanical keyboards have individual switches, usually comprised of a spring and a lever mechanism for each key. Membrane keyboards use conductive traces to detect individual keypresses and typically utilize rubber domes to approximate the spring and resistance of switches. Good ones feel pretty nice to type on, but those used to typing on a mechanical keyboard won’t be fooled.

If you know nothing less than a mechanical keyboard will do, congratulations: Your job is still nowhere near complete. There are dozens if not hundreds of different switches