You’re making the baseless assumption that components related to the turbocharger system are somehow more failure prone than other components. Turbochargers have been around for over 100 years, they are not some new unproven technology despite the fear mongering that you like to spread.
And no, there are not “53 pipes/joints” in the charge air cooler system; you’re making a fool of yourself with your complete lack of knowledge. They fact that you make the claim that “they’re all going to leak” is even more comical.
As far as cylinder pressures, the G2 3.5 GTDI was engineered for forced induction from the beginning. There is no NA version. They didn’t just slap 2 turbos on the way people slap superchargers on the 6.2.
Both the 3.5 and 6.2 are OHC engines with VCT, the only difference is the 3.5 has an additional cam on each bank. The 6.2’s intake manifold is more complex, as it features intake manifold runner control with 2 vacuum actuators and 2 position sensors.
Making the broad claim that one engine is more reliable than another based simply on part count is not only inaccurate, but just plain ignorant.