Does the benchmark score relate to the laptops, or just to the processors? From what source are the benchmarks? Off the top of my head, if all you want to do is 'mundane' stuff, I'd say the faster processor might deliver you better performance than the separate graphics card in the Sony. Either one should be a pretty quick machine, though.
Surface Pro 4 UK release date, price and specs: Thinner, lighter, faster with new Type Cover and Pen