Hmmm, It would have been a nice combination I think :-)
And yes the gear ratios are different. 2 reasons for that. The normal transmission is with 6 gears and made for the diesel and the DCT is with 7 gears.
End ratio in 6'th gear is 0,69 and in the DCT in 7'th it is 1,00
'06 E91 330dA Sparkling Graphite|19" AvantGarde M359 Satin Black|335i brakes|Bilstein B16 IRC|Powerflex|GroundControl|Wagner|Ecotune|Turbo Dynamics|Zimmermann|Hawk