Mercedes turned Singapore into a split-spec test session, with Kimi Antonelli running the team's latest upgrades and George Russell reverting to the older package. The move comes after Red Bull broke Mercedes' stranglehold at Sepang, where Max Verstappen won from pole despite the Silver Arrows debuting a substantial upgrade—their first major package since Montreal. Toto Wolff couldn't tell if the new parts underperformed or if Sepang's unique conditions masked their potential, so he's treating both drivers as "test pilots" through Marina Bay. Early data suggests the upgraded car is trickier on the limit but not slower, while the old spec feels more planted. With 11 wins from 16 races and a double championship nearly locked, Mercedes can afford the compromise. The question now is whether to keep swinging for big upgrades or dial back to incremental steps that are easier to debug when the cost cap bites.
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