i know nothing about wire. thanks. :|
Solder wire has a lower melting point, allowing you to melt it onto something else. In it's wire form, it will also snap very easily. (not good for fastening things together). Mechanical wire (I'm assuming electrical wire), is designed to withstand high temperatures (and hence, electrical currents), and are usually be bent much more. It's also usually sheilded in rubber (e.g. electrical cords, computer cables, coxial (tv) cable, etc).
