A high pinion helps with front driveline angle as you add lift.
Just about every new 4x4 out there, including IFS, runs high pinion these days. High pinion was developed specifically for the front axle in a 4WD application. Low pinion is just a carry over rear axle design that works in the front, before they started designing specific front axle center sections.
A high pinion axle (or center section) generally doesn't work that well in a rear axle application. The gears are running on the wrong side of the tooth, oil circulation is backwards, etc. Not counting the aftermarket high pinion options.