[zzzcpan]

It depends what you are looking for in a rating. If you are making a new programming language and want to know which concepts and syntaxes are familiar to people, than TIOBE is probably not that far off. PYPL on the other hand seems to show how many people want to try the language, not necessarily trying or sticking with it, but more like a measure of its visibility on the market. Both are useful metrics and help to paint a better overall picture.