neilsh owns both so I'm sure he'll fill you in if and when he reads this post.
There's also a few people that have their own music shops on SZ so I'd imagine they sell both of these and can fill you in on all of the plus points and negatives.
When you are wanting an opinion is it regarding sounds, styles, ease of use etc?
Also if you fancy a Roland, try waiting for their newer E80 as that should hopefully offer far more than the G70 can.
I've purchased both the G70 and Tyros 2 but don't want to put any comments for fears of starting yet another this is better than that war. I've read enough of those lately
Good luck in whatever you decide, go and see both and let your ears and fingers decide and not just the comments read on SZ.