My girls have only ever been dressed the same twice. And both times it was just so I could take a photo!!
Tavia was a biger baby (although Dacey is taller now) so even if people bought them the same thing, they didn't fit at the same time.
Also, as I have 2 older daughters most of their clothes were hand-me-downs anyway.
When I am buying clohes I tend to buy what I think will suit each one. Alot of stuff they share but as they are getting older, they are beginning to decided whose is whose themslves.
I was best mates at school with some twis they had and stll have a really identity crisis and I think their folks dressing them the same and insisting they were in the same class at school etc contributed to that they never met anyone who didnt know they were a twin or didnt know both of them Steph is pregnant now and was dreading the posibility of having twins but luckily there is only the 1. I would love to have twins but would encourage them to be themselves and have develop their own personalities.