Yes. However, sheer skill can still top a more powerful opponent. Take for example, somehow Primitive Guyver, a standard Guyver was able to beat Life Force Guyver, a prototype Warrior unit which is about equal to a Warrior Guyver. I'm not saying you have a standard Guyver take on Dreadnought for example.
There is a topic out there on a what if Warrior Guyver or Warrior Guyver 2 was able to spend 2.5 million years in the past. Both of them would almost fight Dreadnought with a small chance of success.