Toast 7 does do a lot more but it does lack a great feature found in DVD2OneX:
Combining multiple movies to one dvd (join)....which is great when you want to put a few old comedies on one disk to take with you.
Or digging through the files and combining seperated chapters (I did this recently with my Sealab Season 3 dvd's.....all episodes are now back to back with chapter navigation on one dvd).
If I were you I'd go with Toast 7 first, but when you have the means get DVD2OneX...it's worth it.