Yes, with regards to performance, Nvidia GeForce GTX 980 Ti outperforms, Radeon RX 5500 by 21.1% in 3Dmark benchmark.
When it comes to power efficiency, GTX 980 Ti falls behind with an efficiency score that is 23, lower than that of RX 5500 32. Consuming 150 watts, RX 5500 has 39.1% better power consumption to performance ratio. The efficiency score is calculated by comparing the benchmark score with power consumption
GTX 980 Ti price to performance rating is lower than RX 5500's. RX 5500 offers 385.7% better value fo money.