NVIDIA Tesla K40s 's Advantages
More VRAM (12GB vs 8GB)
Larger VRAM bandwidth (288.4GB/s vs 192.3GB/s)
576 additional rendering cores
NVIDIA Quadro P4200 Mobile 's Advantages
Released 4 years and 3 months late
Boost Clock has increased by 88% (1647MHz vs 876MHz)
Lower TDP (100W vs 245W)