Hate to be the bearer of bad news but mine line up exactly down to the millemeter ( just went out and measured to be sure ) I'm not saying it won't change over time, but for now they are in fact identicle. Wont' matter either way though since I'm doing the magnaflow system as wellSRT800 said:The tips won't and never will line up with the fascia with the current design.
It's a common problem with dual exhausts and requires very specific design and manufacturing controls to solve. Only the top tier suppliers and their customers worry about it enough to fix it.
You can solve it yourself by adding an additional hanger to each leg aft of the rear end with a small flex before it. Then the thermal cycling won't warp the tubes and the hangers can lock the tip in global position relative to the fascia.
Did you know the 300C exhaust can grow up to 25mm in length due to thermal expansion?