Is the Difference between a gsxr 600 and gs500 THAT big?

I’m looking to move up from my ninja 250, and i would prefer to get the gixxer 600, but the price ($9/10,000) is a little steep for me right now. I found a BRAND new 09 GS500 in the suzuki dealership by my house for $,4300! thats more my range. I’d be willing to buy used if i could find a good deal for a 600 but i cant! Is it true that upgrading from a 250cc to 500cc isnt big enough, and i’ll grow out of it real fast? Is it worth it? Should i just save up for a 600? It’s tempting because the 09’s are BRAND new and only 100cc’s less! I want to be smart! Thanks guys!