Actually, they're both 32/36 carbs, not 32/32. And if the pic of the Carter-made one is accurate, it's a licensed Weber DGAV, while the other carb (Holley 5200) is a licensed Weber DFAV. The DFAV is basically a mirror-image DGAV, and was made under license by Holley for Ford's Pintos, Mustang 2s, etc.
Differences to consider:
They have different shapes around the air horn where the air cleaners go. A DGAV is square while the DFAV is football-shaped. You can get adapters for aftermarket DGV-series air cleaners, or you can use junkyard Pinto/Mustang/Capri air cleaners or bases on a DFV-series.
The other thing to consider is that since they're mirror images of each other, the throttles go the opposite ways. On our engines, DFV-series carbs would have their throttle on the rear of the carb, pulling to the driver's side if mounted with the float bowl to the front, and to the right of the carb pulling to the rear if mounted with the float bowl to the driver's side. To get the same 'directional pull" with a DGV-series, you'd have to have the throttle cable/rod either on the front or driver's side, both of which would be trickier than the other carb. If you use a throttle cable you could do whatever you wanted, but if you're using the Ford throttle rod I'm pretty sure only the DFV-series would work without modding the throttle arm (which might need to be done anyway, depending on what car you're putting it into.)
As mentioned above, the Carter/DGV-series carbs are NOS, and the Holley/DFV-series carbs are old rebuilds. I don't know about the Carter's jetting setups, but with the Holley rebuilds you don't know what jetting you're getting unless Tom would check it for you. If you need jetting info, there's a good long thread here somewhere... here it is:
http://fordsix.com/forum/viewtopic.php? ... highlight=
Best place I've seen for getting jets is through a guy in Italy on ebay, alfa1750;
http://stores.ebay.com/ALFA1750S-CARBUR ... ARTS-STORE $2 each, but it'll take 2 weeks to get them.