Micco,
For me the bottom line is really this....all of these boards Ketron, Gem, Yamaha, Korg and whoever else is making one. They are all good boards. When you compare like to like, meaning it's difficult, if not impossible to compare a $1000.00 board to a $3000.00 one. However when you get in the same price bracket, I think they are all great boards and I really do not think one is better than the other except for each individuals likes dislikes and ears.
Though they sound different, that does not imply one is "better" than the other. It has all to do with what it is us players bring to the table to judge one board from another. What user interface,sounds,styles seems more intuitive and inspiring to each of us.
So when you ask the question which is better? The answer is, it depends on who you are asking and their personal preferences.
Now if you ask which is better, a $300.00 Casio or a Ketron SD1 or the Tyros or other boards in these price brackets, there is no doubt that you will get a nicer board with nicer sounds when you get into the higher dollars.
I'm not sure there is a "better" though when you compare both in the same bracket, they're just different.
Terry
[This message has been edited by trtjazz (edited 10-22-2002).]