Which car is better 2001 audi a4 or 2001 bmw 325i?

[DangerousDan]

Ok im trying to decide which car to buy..

I've narrowed it down to about 4 cars.
2 are 2001 bmw 325i sedans with around 75,000 miles
the other 2 are 2002 audi a4 1.8 quattro with around 75,000 miles on both cars

Now the 4 that i found are pretty much the same price.
So im just wondering which is faster/more reliable?

And they are both automatic right?