If I was in your shoes, and the cost to change the tip later was that much more than just ordering it with my build, I might have done that (I like the double tip look a little more than the single). But since I can get an OEM or aftermarket one for the same price or less, and the install is simple (so no cost), I decided to go stock now, knowing I can change it later if I get tired of the single tip look.However that wasn't exactly what you conveyed in the quoted statement, hence my misunderstanding. Either way it's not important & the main thing is it's only down to personal tastes. Even though I dislike the single tip & always have, I can appreciate that some might possibly like it if only because it is so unusual. One thing I did note is that you state you can order the twin pipe for the same price as factory at a later date & therefore you simply can't lose should you ever decide to do so. But it's highlighted yet another of those quirky pricing differences betwixt Porsche U.K & Porsche U.SA. In the U.K it's considerably cheaper to fit the twin pipe at build rather than later. From the factory it's only £380.00 ($513.40) & cheaper than in the U.S. However should decide to retrofit the item afterwards it's £520.00 ($702.55) which is quite a difference.
With my logic, that equates to getting two tips (single with build and double after) for the price of one (double with build).