Difference between Extract Sentiment (English) versus Extract Sentiment when both use Sentiwordnet?

I have a questions of clarification about sentiment values. Both operators use Sentiwordnet 3.0, but display different results. The Extract Sentiment (when using the Sentiwordnet model) gives me a score of 14.426 - interpreted as the difference between the positivity and negativity counts of the sentiment analysis. But the Extract Sentiment (English) operator, also using Sentiwordnet, gives a sentiment of 0.084. Is the second, Extract Sentiment (English) using Sentiwordnet, giving the percentage of positivity or negativity? Just wondering how to interpret these differences. Thanks.