Without going in an in-depth comparison : Behemoth ( https://github.com/DigitalPebble/behemoth) can be used to deploy your UIMA or GATE pipelines over a Hadoop cluster so both tools are on an equal footing from that point of view. UIMA-AS can be used for non-batch, low-latency processing, there is no equivalent for GATE but building one with e.g. Storm would not be too difficult to do. UIMA is likely to be faster than GATE indeed however it has no equivalent of JAPE.
Well, I hope that this will change soon (the equivalent of JAPE, of course).
Peter
