Find out if the mounting point for the biminis are the same - meaning, check the width at the mounting point... check the height from the floor as well (for the mounting point). Next verify the bimini length & height "opened" is the same - and compare the heights of the two windshields (and/or the height of the opened bimini above the windshield. Also compare the physical dimensions of the two windshields. If those are all the same then there's a chance. If there's obvious differences, then no chance.
You could also try contacting Grady directly - if the part numbers are the same, then yes.