l like both styles too, but there's an added realism on the newer one which is definitely worth changing to. And l agree there are many more newer styles which are better too.
One other thing which some might hopefully find helpful is also to do with certain older styles. When l first switched from Tyros 5, to the Genos l was so engrossed in just enjoying playing the Genos that l was mainly using some registrations that l'd bought for the Tyros. Whilst the sounds etc sounded better than the Tyros, on certain styles there was an annoying faint screech every few bars. The nearest thing l can describe it to, is the fretting sounds on a guitar. Although faint it was distracting and one of those sounds that you can't unhear once you've heard it. The simple remedy was to replace the styles with the newer Genos styles and that solved the problem.
kind regards,
Russ