Yes, with regards to performance, Nvidia GeForce GTX 1660 SUPER outperforms, Radeon RX 5500 by 27.1%.
The GTX 1660 SUPER is more energy-efficient considering its peformance, consuming 125 watts to produce 3DMark score of 6078. By comparing its benchmark score to its power consumption, we get an efficiency score of 48.6. RX 5500's efficiency score is 31.9, 52.6% lower, making GTX 1660 SUPER the smarter choice in terms of power consumption.
When considering value for money, GTX 1660 SUPER offers a better deal than, Radeon RX 5500 by 8.8%. Here is more in depth overview of the price and used prices of GTX 1660 SUPER Price History and RX 5500 Price History