Yes......completely different.
Neuropathy involves the nerves in an uncontrolled diabetic.
Circulation problems involve the arteries, almost always to the legs, in a diabetic but also in no diabetics.
"However I am getting cramping pain in that leg when I walk and having to stop."
That is almost certainly circulation problems called intermittent claudication and can occur in non diabetics.
The burning pain in your foot, that you describe could be anything (including diabetic neuropathy) . Wait and see what happens.