The link is the same viking i linked, the
ribble has shimano sora which i would class as shimano's 'proper' entry level parts range Its fine for proper road riding on a refular basis on a budget, the viking uses lower down the chain parts but is one of those bikes that will last a lifetime of you look after it, it comes with shifters on top of the bars and is probably easier to get on with if your used to conventional shifters. The viking come in lots of colours but are all pretty much the same, infact you could put shimano sora on a viking bike for under the 400 of the ribble, i personally wouldnt but you could. Id look at second hand bikes with sora tiagra or 105 if i was after the best bike for my money under 500