630 to 530 chain conversion

Whats the difference in power going from a 630 to a 530 chain and sprockets on a 900cc bike?

From what Ive read, since there is less rotating mass, the bike will rev up/accelerate a bit faster, wont affect HP, but it might "feel" like it it has more "grunt"

...Plus the wide selection of 530 chains available is mind boggling, you could get those chrome plated or multi colored types , and the option of X-ring too:side: