That's a very interesting find:
The images in question:
and
I am fairly positive it's the same guy, but these days even if it is that doesn't really mean anything. All of these people are just paid models anyway.
They just happened to both get the same guy? Unlikely, but it could happen, and by the looks of it, it HAS happened.
Looks like the PayPal image is reversed though. First of all, his watch is on his right hand... but the main reason I think so is because it seems that most laptops have the CDROM drive on the right side. It looks like the same laptop was used in both pictures... He even has the same shirt...
I'd almost go as far as to say that RegisterFly ripped their picture off of PayPal's website, because they are definitely not related at all business-wise, and many times when a big company hires a model, they will have to sign an exclusive contract stating that they won't pose for similar products. This is a general rule set in place to cut down on people confusing whether or not Company A is associated with Company B, etc.
Interesting nonetheless.