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BMW M6 vs BMW X6 M: 5-year value retention (52% vs 52%), resale value, and cost of ownership head-to-head. BMW X6 M holds its value better.
On five-year value retention the BMW X6 M comes out ahead, holding about 52% of its value versus 52% for the BMW M6. Over the first five years the BMW X6 M loses roughly $61,150 while the BMW M6 loses about $57,313 — a gap near $-3837.
First-year drop is the biggest factor: the BMW X6 M sheds about 14% in year one versus 10% for the BMW M6. If you buy used, the steeper early drop is what the original owner absorbs.