which is worse, If a person touch an iron pole,  and a TASER  gun hits him/her, or

If a person touch an iron pole,  and a TASER  gun hits the iron pole

Will the person die in both cases?

25 minutes ago, PeterBushMan said:

which is worse, If a person touch an iron pole,  and a TASER  gun hits him/her, or

If a person touch an iron pole,  and a TASER  gun hits the iron pole

Will the person die in both cases?

No.

Since a TASER doesn't use the Earth ground as part of its circuit, touching a metal pole while being hit by one will make no difference.

If the TASER hits the pole: For one thing, the darts won't stick and would glance off, and even if they stuck, the circuit would be completed through the pole and not the person touching it, so they would not be effected by it.

11 hours ago, PeterBushMan said:

Will the person die in both cases?

The taser is a non-lethal weapon, though some underlying medical conditions can make it deadly in certain cases. 

This sounds like something from a Hollywood movie, where the good guy tases the bad guy from five stories up because he was touching the metal handrail.