Manufacturers: The McLaren 750S is produced by McLaren Automotive, a British automotive manufacturer known for its high-performance sports cars. The Mercedes-Benz SLR McLaren, on the other hand, is a collaboration between Mercedes-Benz and McLaren Automotive.

Production Years: The McLaren 750S is a hypothetical model as of my last update in January 2022. There's no specific model known as the McLaren 750S. However, the 750S designation might suggest a high-performance variant within McLaren's lineup. The Mercedes-Benz SLR McLaren was produced between 2003 and 2010.

Performance: While specific performance figures for the McLaren 750S aren't available, it can be assumed that it would offer high performance given McLaren's track record. The Mercedes-Benz SLR McLaren, however, was known for its impressive performance at the time of its production. It featured a supercharged V8 engine producing around 617 horsepower, capable of accelerating from 0 to 60 mph in around 3.6 seconds.

Design: Both cars feature distinctive design elements. The McLaren 750S, as a hypothetical model, would likely incorporate McLaren's signature aerodynamic design language with sleek lines and aggressive styling. The Mercedes-Benz SLR McLaren, designed during the early 2000s, has a more retro-futuristic appearance with its long hood and prominent grille, reflecting both Mercedes-Benz's and McLaren's design ethos at the time.

Technological Features: Both cars would feature advanced technological systems, although the specifics would vary. The Mercedes-Benz SLR McLaren, being an earlier model, might not have as advanced technology as modern McLaren models. However, it still incorporated cutting-edge features for its time, such as adaptive aerodynamics and a carbon-fiber monocoque chassis.