It's impossible to decide on something that has not yet been made available for sale, if it is indeed finished.
Personally I would not want to haul around anything that weighs as much as the Genesys (I wish they had named it something that is easier to remember how to spell!).
Yamaha will no doubt release the Tyros soon, but it still could be 2003 before we see it in the US. Hope I'm wrong. Then, the early buyers can field-test it, report the bugs and wait several months while Yamaha denies that they exist. Then wait a little longer for them to be fixed. Again, I hope I'm wrong but that has been their history.
DonM