Use the same evidence selectively, but give it a different job.

The resume proves what you achieved. The cover letter should connect a small number of those experiences to why consulting and why the firm make sense.

Choose one or two examples and explain the motivation or transferable skill rather than restating every metric.

Cut any paragraph that simply reproduces a resume bullet without adding context or rationale.

Respectful pushback is a skill by itself. I practice saying the evidence first so it does not sound personal.