Which part? The landing page? Those are simply a cached result displaying as a ticker to make it looks real time but it actually loops through the result.
Java 7 is faster in some cases. Also, some Java apps will require Java 7 — but obviously that doesn't apply to you if you aren't planning on using any new Java apps and those don't force an upgrade.
I don't think 'better' is the right question. Their's room for multiple frameworks. To answer the question I think Meteor's strong suit is live coding for rapid prototyping.