Today I tried my full frame camera Nikon D600 after a long time instead of crop sensor Nikon D7100.
I was surprised that the quality of image got lot better focusing was faster and the results even in low light conditions were satisfactory.
Nikon D7100 has more reach because a 600 mm becomes 900mm because if crop of 1.5 x .
That is a good advantage but for me image quality surpasses other benefits and I find that in Full frame Camera.