The F30 is definitely bigger than the E90 in side out but not by much! as I can see the back seat is way more roomy now.
2003 E60 530i - PSS9 Coilover/M Kit/BBS GT-RS 19" wheels - retired
2006 E91 335i - Procede V5/Forge DV & FMIC/Bastuck quad exhaust/P1 Steering Wheel/Sachs Coilover/M kit/19" RS wheels - retired
2011 F10 535i - Stock