It is the same conrod only 1 (heavy) bushing less. The weight of 1 brass bushing compared with only aluminium in the place makes the rod lighter. It is just a friction but at 40.000 rpm it could make a difference, every gram counts with accelerating from 0 to 100km/h in just 8mm..... (that fast accelerates conrod/piston !)

Will you notice the difference ?
Maybe not....
Difference in life ?
I think not...