I also have a Prince Exo3 93, which is a lovely racket but just a touch too heavy for me, whereas the Bio 300 is perfect.
I didnt go for the Tour version, I just stuck to the standard 300 and it suits me just fine. I've made no modifications at all....I havent needed to. Although I look forward to the gecko tac grip losing a little tackiness soon....its pretty clingy lol.
Plus, I think with almost all of the Bio range, they are nice looking rackets as well.
"Tennis is just chess with balls."
Prince Classic Graphite 100, Prince Exo3 Graphite 93...who knows...who cares.