Its unusual for an OPC to have a 10 year old car for sale - it might be on a sale or return basis for a customer, so check that it is under their used car programme. There will be a premium for the OPC sale though, they will be making £2k at least if its being sold for a customer, and £4-5k if it is their own stock.
Private sales will always be a better buy, assuming you get it inspected by a reputable person or OPC and know what needs or may need attention.
The 75k miler has had clear lights fitted all round, a popular upgrade and £650 worth - servicing by Northway will have saved the owner some money over repairs at an OPC,. but Ray will probably have done a more thorough job and will have pointed out anything else amiss - Ray will do an inpsection for you if needed, and is a genuine and knowledgeable guy.
The other car has savannah interior which is a bit love it or loathe it - and can make resale a little more difficult as a result. It appears to be flat black, rather than metallic. Its also got the clear perspex and perforated grilles of the wind deflector missing in the photos.
Whichever car takes your fancy, get the air con checked out, the front rads and condensor are prone to corrosion due to road debris building up in the front air vents - condsor plus rad replacment and a regass is about £1600 [

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