It's larger volume. More volume for air to occupy. Simple physics.
If you want to get smart about it you could start playing with tubing diameter, path lengths, bends, etc. to try and keep the airspeed up while reducing the piping size. Colder side piping could use a smaller piping diameter as the air is lower in density. The pre-intercooler density is greater than post-
intercooler, so 1 psi between the two contains differing amounts of actual air. The airspeed between the two is also lower, as the cooler denser air is moving slower than the less dense, hotter air (Less energy). That doesn't even get into what's happening in the
intercooler and how the pressure/airspeed changes in the core, or more importantly how the entrance/exit of the intercooler/tanks are designed (I want to do some testing on modified inlet/outlets of intercoolers).
This is one of those ideas if I had a shop I'd love to play around with this stuff for a week, but I would guess on a non-race car it's not worth the hassle for the terribly small gains. F1, sure. These cars, nah.