I have both and they are setup very similarly. Both 3x10, the Raleigh is 50x38x30 and 14-23 cassette with 700cX37mm, and the Centurion is 49x46x32 with 11x36 cassette with 700cX35mm. Both have Acorn bags, both with Brooks flyers and Acorn tool rolls, the International has a compact bar bag and the Pro-tour has a Mike's rack and a small rando bag.
Both have Shimano SL-780 and BL-780 shift and brake levers and center pull brakes albeit the Pro-tour's are stud mounted. Both have Ultegra RDs. The International has a Dura-ace triple FD and the Pro-tour has a 105 triple cut and modified to run 1/2 step + granny.
Which one would you keep?

I like the looks of the International a little more, so if I had to choose, that would be the one. I’d make room and keep ‘em both, though.

I’d go international as well. I love mine. I’d swap the 11-26 to the Raleigh too!

I voted both but international is my preferred.

Yes

I’d keep the international but swap wheels before cutting the Centurion loose.

Ditto.

The Internationale

International, but change wheels first.

N+1

Are there any differences in geometry that would affect the decision?
My old Raleighs (incl. an International) have relatively low bottom brackets, which are convenient when stopping at lights and putting a foot down.
Otherwise, I'd give extra points for fender and/or rack fittings.

Steve in Peoria

I would have a hard time letting go of either of those, but in agreement with most posts, if I had to choose I would keep the International, but swap the wheels. In my totally subjective biased personal opinion, not a huge fan of the yellow rims with copper tone International frame. Although the yellow Conti labels lined up with the valve stems do look classy, I think they would look better next to the maroon Centurion, might even match up with the pump? I still vote keep them both, but if you don't I am changing my vote to "send one to me"

I went with other. If they were my size, I’d have picked “Send one to me!” I chose other because I think you should flip a coin and pick the one you hope for while it is in the air.

I dig the brazed on posts for center pulls and I dig the chrome socks front and rear…
I can’t help you.

Vote One for the International

Actually neither one is leaving the fleet right now, they have different riding characteristics and uses.
Those goldish rims look great on my Raleigh Grand Prix, might go back to that and put some Deore hubbed wheels with Mavac A319 rims on the International.

But the Raleigh won! The Centurion has got to go.