What would be the difference between a ridge fork that is suspension corrected for a long travel bike vs
one that is suspension corrected for an (older) short travel bike?
Thanks in advance
You mean rigid fork, right?
The idea behind a suspension corrected rigid fork is to try and approximate the axle to crown dimension of a suspension fork. Some suspension forks have more travel than others, and are therefore taller, so suspension corrected rigid forks come in different sizes, too.