what has more surface tension soapy water or tap water?

Answer 1

Tap water.
Soap breaks down the surface tension.

Answer 2

Tap water has more surface tension. If you want to test this, you can try to use the surface tension of tap water to float a needle, then add soap. The needle should float in the tap water, then drop in the soapy water. You need to be careful when trying to float the needle, you need to put it on the surface.