I'd say If they are both a 7/8" quill then you can replace one with the other .

there are stem riser extension tubes, too.. those you put the extension
in the fork, then the existing stem into the top of the extension tube.


You can expect once you raise your handlebars, all the cables and housing will be too short.
so then you replace all those too.
Other than using the stem raiser tube, and the existing stem,
also have to remove tape and levers to get the old stem off and the new one on