The 3.0 pan itself is barely improved over the 2.5. It has 2 turning vanes internally and a bit more ribbing on the exterior. The internal (lower) baffle has more open area which allows oil to drop into the pickup area BUT it also allows the oil to slosh upwards away from the pickup during hard cornering maneuvers. The windage tray (upper baffle in Ford-speak) is far superior in the 3.0 as the ratio of open to closed area is much higher and minimizes the amount of oil splashing off of it and back up in to rotating crank assembly. Unfortunately, installing it means using the 3.0 pickup and changing some of the lower to upper crankcase bolts as they support the pickup.
My 2.5 uses a 2.5 pan with 3 extra baffles TIG'd (1 slosh baffle and 2 drainback baffles), the 2.5 lower baffle (modified slightly), a 2.5 windage tray (custom machined w/ a stainless screen added) and the stock 2.5 pickup. In all likelihood, this setup will also be going on my 3.0.