What are the key differences between the Audi A6 50 TDI and A6 55 TDI?

I'm trying to decide between the Audi A6 50 TDI and A6 55 TDI. Both cars have similar specs and features, but I'm curious to know what sets them apart from each other. Is it just a matter of engine power or are there other important distinctions to consider?

The main difference between the A6 50 TDI and A6 55 TDI lies in their engine power. The A6 50 TDI has a 3.0L V6 diesel engine producing 286 horsepower, while the A6 55 TDI has a more powerful 3.0L V6 diesel engine that puts out 349 horsepower. However, in terms of features and design, the two models are almost identical.