Excellent post, confirming the quote by Naomi Robbins that "One graph is more effective than another if its quantative information can be decoded more quickly or effectively by most of the obervers". Based on this definition, both your representations are more effective. I may also try the first bar chart sorted by either of the two values.

Now, if somehow one was able to compute the areas of the two figures in the radar chart, maybe that provides a measure. But, how do you decide the relative importance of each attribute?