Fair comment.
Caddy has coil on plug and I run a coilpack so both opinions will help you decide.

like I said I use omex 710 ecu on V6 Lancia engines and it works well but that's in N.A. form on throttle bodies.

My advice is don't over spec your engine a std engine will do 470 bhp with aftermarket management and a borg turbo.
caddyshack will explain more.