On the one hand jQuery seems to be the more popular one, but then again Prototype is already built into Rails. I've also read a bunch of articles online from a few years ago talking about how jQuery is more concise at some things but sloppy on others, and giving various other opinions.
So my questions are to the people who have used both (preferably recently):
- Is there a significant difference between them or are they now pretty close to each other in terms of functionality and code writing?
- How high is the switching cost in terms of things that have to be relearnt and code that has to be rewritten?