Both heads are "PM3" castings IIRC while some D15s have PM8 codes. Really, the only head that would be similar is the D15B6 head but that has a smaller intake manifold.
He was referring to swapping the complete head; it will still be a "D15B2" so to say.
With the D16A6 Si cam in your D15, you need a 96-00 D16Y cam gear to correct the cam timing.