They are definitely the same make and if they are the same ones they they are a bargain price and worth buying without hesitation! I do remember Giles actually going to the supplier in Kent and trying a number of chain sets out before deciding upon the ones he has. The tread gaps on his BFG KM1's just swallowed any other chain size and would have been infective! I could try to find out the part number for the chains that Giles has, but this may take some time 
