The Tyros 2 is an excellent keyboard and I would not hesitate to advise you to purchase it, simply because you can do so much with it and there are lots of 'styles' available free or, to buy on the internet which should keep you interested for a very long time.

The PSR-910 is a younger keyboard and therefore has a better sound system. It is also lighter to carry if you 'gig' but it is a bit limited in what it can do in comparison with the Tyros 2.

This is just my opinion - the choice is yours of course.

Audrey