From techpowerup.com,
AMD FirePro W2100
Memory Type: DDR3
Memory Bus: 128 bit
Bandwidth: 28.80 GB/s
Pixel Rate: 5.44 GPixel/s
Texture Rate: 13.60 GTexel/s
Floating-point performance: 435.2 GFLOPS
Nvidia GTX 750Ti
Memory Type: GDDR5
Memory Bus: 128 bit
Bandwidth: 86.4 GB/s
Pixel Rate: 16.32 GPixel/s
Texture Rate: 40.8 GTexel/s
Floating-point performance: 1,305.6 GFLOPS
Taking the pixel rate, texture rate, and GFLOPS, the GTX 750Ti is much faster than the previous FirePro W2100 that you had. If these 3 parameters were more or less equal/similar, the memory bandwidth would have been the tie-breaker.