Yes, with regards to performance, AMD Radeon RX 7700 XT outperforms, Radeon RX 6400 by 376.1% in 3Dmark benchmark.
The RX 7700 XT is more energy-efficient considering its performance, having power consumption of 245 watts and a 3DMark score of 17245. By comparing its benchmark score to its power consumption, we get an efficiency score of 70. RX 6400's efficiency score is 68 .So RX 7700 XT leads by 2.9%, making it the smarter choice in terms of power consumption.
When considering value for money, RX 7700 XT offers a better deal than, Radeon RX 6400 by 60.0%.