The best way to tell is to degree each cam and compare...
Also, the faster the ramp on the cam, the faster the valve will close... The faster it closes, the harder it hits the seat which will increase the wear on the seat and limit durability...
That’s an old wives tale and it’s wrong. You can shut the valve quickly and not have it slam on the seat. In all my years I’ve NEVER seen seats beat out from a valve “slamming” into the seat. When the springs are worn out or incorrect for the application you see the seats getting beat up, but that’s not the cams fault.
