Thinking about it a bit more I still don't quite get why manufactureres still make "Standard" 130 BCD and "Compact" 110 BCD cranks, why not just make 110 BCD only and a wider variety of Rings in 2 tooth increments from 34 - 54 to fit that, so egotists can run 54/42 and wimps can run 50/34....
The new Shimano (and IIRC Campag) cranks are '110' and you just pick the bigger or sdmaller chainrings.
In the past it was though that big 110BCD chainrings weren't that stiff hence the larger 130BCD crank arms. In the current trend for big chunky crank specific rings they can be built a bit more burly and it's not an issue so there can be one crank size can rule them all.
Of course, Shimano have chosen to make a 4 arm offset version of 110BCD as a new 'satndard' but thats a different conversation.