take a good listen to macColl, he does not sound more like peter pears than jon boden, all 3 are available to listen to on the net, furthermore he was not being compared to walter pardon or harry cox, the use of vibrato does not make him sound more like peter pears than boden ,or even like peter pears, the compoarison is ridiculous.
al , i am not condemning ,but giving my opinion ,which is based on listening to all 3