A great set of real life comparison photos between the F30 and F10, by
Paul Tan.
Although the general styling of the newest 3 series and 5 series is now more consistent and shares more styling cues than the previous generation E90 and E60, there are still significant differences (in particular the front end) between the two designs as these photos highlight.
Here's the tale of the tape for the F30 and F10:
F30
Height - 56.3 in
Length - 182.5 in
Width - 71.3 in
Wheelbase - 110.6 in
F10
Height - 57.6 in
Length - 192.8 in
Width - 73.2 in
Wheelbase - 116.8