GeForce GTX 980 Advantages
More VRAM (4GB vs 3GB)
Larger VRAM bandwidth (224.4GB/s vs 168.0GB/s)
640 additional rendering cores
Radeon RX 5300 Advantages
Released 5 years and 8 months late
Boost Clock has increased by 35% (1645MHz vs 1216MHz)
Lower TDP (100W vs 165W)