What would be the benefit of switching to ANTLR 4 as a parser generator?

Due to the lack of significant improvements of JavaCC over the last years, I got the impression one should think about a switch of the parser generator.

After playing around and testing a bit of ANLTR 4 I am quite impressed about the easieness to transform and improve JavaCCs JSQLParser grammar to ANTLR 4. Still there are some things to solve:

keywords as identifier: solution would be like now
deparsing has to be separated again since the tree node classes of ANTLR could not be provided, like in JavaCC but are automatically generated
tooling around JSqlParser should be rebuild (e.g. TableNameExtractor)

I appreciate any comments to this.

Maybe there is another generator at hand that would be even better to use.