Hi.
The teeth are joined to the rim so there is not a gap,were as the beaded one is on a small scale like dots round the edge (beads) and will show a gap being circular.
Ideally it would be nice if the beads were on one side and the teeth on the other.
As far as anything else you are correct and would need to post some pictures........Hopefully someone can help you with that.
Good luck selling them although there are thousands of them for people to choose from and most collectable ones are the ones that show all the detail.
Dont be in a rush to sell them as you never know one might be worth a few quid