Tyros owners will tell you Yamaha, Roland owners will tell you Roland...

I'm afraid you MIGHT have to check them out for yourself, and see which you prefer personally. Both will do the job you describe, and very well too!

The Roland is a lot heavier (that's the only objective opinion you are likely to get! )...

My take is that, if you ONLY play arranger style, the Yamaha might be the better choice (probably the best selection of styles to choose from), and if you play primarily SMF's, the Roland is probably the way to go. If you do BOTH, you'll probably have to figure out which side is most important... and STILL play both to hear them for yourself.