If you talk faster,yes, GTX970 is quite noticeable faster than GTX770.
But, if you ask if it is worth it to invest an upgrade to GTX970 when you already have GTX770 and play only on 1080p, I would say performance-wise and price/performance-wise, no.
However, if you really want it bad, the investment is also not bad, since GTX970 is not only faster than GTX770 but consumes also less power and runs cooler than GTX770.