Yarpy you'd need about six months worth of rosters to get a reasonable idea of how they pan out, as you're only looking at four or five trips a month. As has been pointed out earlier in the thread, currently the 744 guys do slightly more trips as their destinations are predominantly shorter range than the Airbus's, and have fewer nights away on individual trips. Both fleets operate to the same 750 hours annually.
Rosters are promulgated monthly, on about the 19th of the previous month.