I had titanium ceramic coated JBA LT's installed on my 2010 (with M90 blower) years ago..along with the 62mm tb, and a VMP 94 tune. Difference was night and day. With the blower on 2 blocks from the driveway, lift the hood, and I can push down on any of the 8 primaries with my fingers..and hold em there. Everything else under the hood will take your fingerprints off.
With the LT's coated both inside and out, I have this theory that the internal gases are hotter. On paper, the hotter the exhaust gases are, the faster they will flow, which might just add to the total effect. The JBA LT's are longer than kooks. More tq down lower, but still loads at the top end. It wasn't some subtle difference either..it was blatantly obvious, pulls like a mofo. Plan B was to just use a smaller blower pulley.
But the LT's work good, whether in blower or NA mode. Most of the time I'm not into boost, so they were a good, albeit expensive, investment.