The Z 585 is slightly more forgiving and features a high-strength steel face insert in the forged clubhead for higher COR and ballspeed at impact. A new internal “speed groove” behind the clubface further enhances face flex across a larger area of the hitting zone for extra forgiveness on off-center hits.
Though Srixon has long been known for impressive forged irons the woods were always high-quality products that were often overlooked. With the new iteration including most notably the Z 785 driver things are about to change in a big way as new technologies and materials have brought ball speeds (and distance) up to the level of the longer drivers on the market.
Putters with more forgiveness and stability like larger mallets typically provide superior distance control because they maintain consistent ball speed and roll even on mis-hits. Unless you’re exceptionally accurate with your contact point (repeatable impact in the center of the putterface) don’t fall overly in love with the more traditional head shapes.