OK, you guys helped me with the cap and rotor now how about the coil?

I found two possible numbers for the coil in my V6 ..... U1174 (NGK 49031 vs U1175 (NGK 49031)

They look identical with the exception that one has a white wire and the other a yellow wire.

Any idea what the difference it .... or if one has a "hotter" spark?

Thanks ...... Mike