Sorry all, I've been away on vacation and not checking the boards.
Diki I am familiar with the E-A7, and these new entry level models have nothing borrowed from it.
The chord fingering and style file format are pure Yamaha, to the point that my favored Roland "short cuts" will not work, I would essentially have to relearn. Chord recognition, and how the arranger manipulates the recorded style pattern are key facets of an arranger and would be very expensive to develop (or re-develop) from scratch. It's possible that Roland licensed this technology from Yamaha, or the boards are actually made on a production line with Yamaha's and are branded Roland. It's been a while since I really dug into these manuals, but there might have been other things I noticed as well.
Further proof is that the downloadable content being sold on Roland's website that work with the new models, doesn't work with the FP-E50 and legacy Rolands. Did you (or anyone else) look at the manuals? What was your conclusion?