the ones with the VERTICAL PATTERN in the center are commonly known as the Luxury Interior available only in full BLACK or full CARAMEL
the ones with the CIRCULAR LOOKING CENTER {these are easily noticeable if they have the blue, red or silver center...} is referred as the SPORTS INTERIOR it does come in ALL BLACK too but only the center can be had in a different color.
there is a third set but it doesn't apply to U.S. cars...it's the COMFORT interior or something along those lines...it looks VERY MUCH like a regular 5-Series interior, but has MORE comforts than either of the other two interiors...I do believe they had a massage feature...