I've only used the Senior Reamer,....(that name kills me)...and an old switch-blade I've had for years, so it would be the only one I can recommend.
Senior Reamer has yet to put even the slightest gouge in any of the dozens of estate bowls I've cleaned out, removing all of the former owner’s cake all the way to the bare briar.
The knife however, dull as it is and only used outside in full sunlight…..I would not recommend.