I hunt both species in the same river bottom. The mulies will respond to rattling but not as aggressively as whitetails I've found. As for techniques, you can stalk mulies alot easier than whitetails but the big ones can be even more elusive than the smartest whitetail. We hunt out of tree stands and have both deer use the same trails...it's just hit and miss every year. This year the whitetails outnumbered the mulies and last year it was totally opposite. I love hunting both types equally! JDinAB