The studs are different for a reason. On top of the aluminum caps with be a much disputed girdle.

Living in southeast Michigan is a good thing in that no matter where you live a fasteners engineer that works for FCA is a stones throw away. I ran the lube vs no lube past my neighbor this morning and got this..

"If there is any built in interference between the cap and block it would cause a change in the joint seating torque. So with the lube,lower seating torque, without lube, higher seating torque.
However, if you are running them down by hand that would not matter nearly as much as if the caps were were being run down dynamically"