Brand, style - whatever you mean by that - and age isn't the critical features.
For the fork to be able to mount to the frame, The features you need to match are steerer tube diameter and length. To be able to reuse the headset and stem you need to match quill stem vs threadless/aheadset stem.
For the ride characteristics to remain the same you need to match the axle-to-crown distance. And if you're using rim brakes, both forks needs to be made for the same wheel size.
Sticking a sus fork in a frame not intended for that is a so-so thing. It'll raise the front end and change the handling. IME the bike will remain rideable, but you might need a few minutes to acclimatize. From a technical perspective, the longer fork will stress the headtube/downtube joint more, which might cause problems.
In 1" steerer you have the option of ISO or JIS crown race. Can't really tell how probable it'll be to encounter the rarer one.