Toytec Ultimate lift kit V.S. Bilstein Adjustable lift kit with 5100 shocks

I'm not a lawyer, so consult your doctor, but I'd bet that the extra height comes from whatever spacer is used to enable the adjustability.

 

While doing some research of my own, I came across the Bilstein 6112 lift with 5160 schocks in the rear, which seems like a nice step up from the 5100 for the little extra money. The lift has monotube shocks in the front and remote reservoirs in the rear. Is there an advantage to having a remote reservoir on the rear when there isn't one on the front? I've noticed a few mid grade lifts that have remote reservoirs on the rear but not front. What am I not getting? The assumption of a load in back?