Implicit in your question is the assumption any one T-B-N contributor has in depth experience with multiple brands of quick hitch on just a Kubota 'B'. Unlikely. Instead you will get opinion.
Land Pride, sold by Kubota dealers, is 100% owned by Kubota. The appropriate model of Land Pride quick hitch attached to a Kubota 'B' is likely to be fully compatible with more implements than all or most other quick hitch brands, certainly 100% compatible with appropriate size Land Pride implements of similar vintage to the quick hitch.
If you are considering implements more than ten years old, when quick hitches began entering the mainstream of compact tractor attachments, not all vintage implements will necessarily fit a contemporary quick hitch without some modification. During ten years the standards for implement hitch points have evolved close to a common standard, at least among the major manufacturers.