Is there a big difference between Nikon SLR camera's 39-point focusing and 5 1 point focusing?

There is little difference between 39-point focusing and 5 1 point focusing.

Under normal circumstances, the 39-point focusing system is really enough for daily shooting, and the focusing speed is good. In a well-lit environment, the focusing speed will not be slower than 5 1 point focusing.

However, 5 1 point focusing is only in low light environment, and the focusing performance is slightly better. But in real life, such occasions are rare, and there is almost no difference after turning on the focus assist light.

5 1 focus:

39-point focus: