NVIDIA GeForce GTX 980 Mobile 's Advantages
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (224.4GB/s vs 96.00GB/s)
1024 additional rendering cores
NVIDIA T550 Mobile 's Advantages
Released 6 years and 8 months late
Boost Clock has increased by 46% (1665MHz vs 1140MHz)