I'll take Regional Biz over Acela
For mid-day trains, I'll take the Regional Business class over Acela.....not only does it look good on expense report, but RegBiz is generally quite empty, so get the extra space and quiet (figure those who are not looking for lowest fare go to Acela, which leaves the mid-priced Regional Biusness seats empty)......If I'm taking the train, it's because I do want the extra time to work or snooze, so the relative slowness of Regional is desirable.
On the topic of trains.....on the EWR AirTrain, ran into an international traveler who had flown into EWR, but his connection was out of JFK! I overheard him asking agents who couldn't advise him on transportation, so I suggested NJTrans from EWR to NYPenn, then LIRR to Jamaica station for the JFK AirTrain. Was that right? I was just going by memory of transit maps---what would be better?