Now i could be wrong here but lets see...the exr5s gw7 and e09 all have 32mb for the sounds and the sounds themselves are new generation with lots of new samples...and their quality is better than the va7.. The psr 1100 i think has 16mb for sounds...which probably means its sound quality is like the psr2000...although to be fair its got some sweet live and cool sounds. The features and screen are much much better on the yamaha. Keyfeel better on Roland. Stylewise id say both are quiet good...but doesnt the yamaha have more intros fill ins variations? The yamaha has more pro features .hmmm pianos i think roland is better. I have played the roland e09 and psr2000...roland sounded better so i would choose the Roland exr5s for sure.