Like the base model Mercedes with “AMG” badges…
I prefer the opposite.
In the same model year, S600 has more torque and HP than the S55 AMG. The M275 V-12 engine was under-rated (at 493 HP) by Mercedes precisely because it out powered the supercharged V-8 (at 493 HP) in the more expensive* AMG model, which came with an aero kit, badging, interior trim, brakes, unique wheels, etc. This was true from the introduction of the M275 in 2003 through its retirement in 2016.
They did the same thing with the SL (R230) chassis - charged a premium for the AMG model with the supercharged V-8, and under-rated the V-12. The V-12 puts much closer to 540 HP to the wheels, and has about 100 lbft more torque. It makes a difference.
The only clue that it is a faster car is the “600” on the deck lid. Those who know, know.
Not that I street race, but there have been just a few occasions where the prodigious torque of the V-12 has allowed me to, ahem, “adjust” my position in traffic to my advantage, and to the complete shock of say, a Mustang GT…
Even 18 years after they were built - the two V-12 cars are very, very fast. And they are Q-ships. No obvious badging Just a subtle V-12 (nothing about twin turbo) on the fender flanks, and that 600 on the deck lid.
I like it that way.
*Not that either car was cheap. In 2005, the S55 AMG sticker was about $175,000, while the S600 was about $140,000. The R230 SL models were similarly priced.