Protoss

The protoss are the most powerful race 1 on 1. Any protoss unit vs its terran or zerg equivalent will obliterate them. The downside of this of course is the cost of the units which is much higher.

-Airial Units
-Ground Units
-Buildings


Terran

The terran are the most well rounded race of the three. Their units are not overly powerful or weak but they arent that expensive.

-Airial Units
-Ground Units
-Buildings


Zerg

Zerg are the opposite of the protoss. Their units are very cheap compartively but are very weak. For this reason they are best used in mass amounts. Otherwise your efforts will be to no avail.

-Airial Units
-Ground Units
-Buildings