Thanks for the reply.
There are the same 4 users on each computer with the same user account names.
Under the profile list on the desktop (the computer with the larger count) I notice that under "Firefox" there are 4 entries for "default (Cookies)" with a count of 184 each. On the laptop there is just one entry with a count of 184. This is repeated for "default (Images)", "default (Installations)", and "default (Poups)". Each of these has a count of 7900 so there are 4 times 7900 for each item on the desktop. They appear only once on the laptop.
The contents under the "Internet Explorer (32 bit)" are the same.
The contents under the "Internet Explorer (32/64 bit)" are almost the same. The same users appear in the list but on the desktop there is an additional "Adminstrator" account appearing with the three items for it (Cookies, Domains, IPs).
Any thoughts? Is the difference important?
Edit: second paragraph for clarity.