Are they too much alike, totally different, neither?
Drawing from PHP-style comparison, this would return true even if they were basically the same but not identical. (Not ===)
Appreciate any insights please.
Disclaimer : I truly believe this question has an objective answer, as I'm not asking which is best, just the main differences.
Studio is built on top of PDT, so it can do everything that PDT can do. It happens that the Zend Studio site has a feature comparison between it and PDT, showing where Studio's features are different.