I've looked into what userbenchmark does and it seems like the overall score is pretty much useless to compare CPUs with a vastly different core count. It even says so in the description that the score favours single- over multi-core performance.
Further down all benchmarks are split between SC (single-core), QC (quad-core) and MC (multi-core) results. The quad-core section seems a bit arbitrary, as most applications I know of either scale very well up to 8 cores or already taper off after 2. But it's just the number of cores the 6700k has, so it can shine in that category too.