i got bigger quicker with DD2 aswell, at ten weeks i was getting are u sure its not twins comments!
DD1 was 3650 full term and DD2 was 3550 4 weeks early, but i honestly believe she was that big because of diabetes (wasnt diagnosed with GD, but found out i have type 1 after she was born)

With DD1 i put on about 35kgs when i fell pregnant with DD2 i was 10kgs heavier then when i fell with DD1, and with DD2's pregnancy i only put on 8kgs, then lost 12kgs by the time she was 4 months old (diabetes related)
i carried both the girls the same but everyone thought i was massive with DD2, i must admit i was big and all out infront, but i didnt think the massive comments were necessary!

in one day i was told by the petrol station lady that i was huge and must only have a week or two left (nope still got 6!) and then i left there and went to the shops and was told how tiny i was!