An engineering logo consists of images that are exclusively technical – such as cogs, gears, and electrical plug icons, etc. whereas an energy logo is more fluid in design. Depending on whether it's an electrical energy logo, liquid fuel, or logo for a solar energy company, the symbols can be varied.
Similarly, there are design variations within the engineering industry as well. For example, an environmental engineering logo would be very different from a traditional engineering firm logo designs. The former would use designs that portray eco-friendly images such as recycling logos, sun icons, abstract galaxy shapes and such.
Due to these important distinctions, it is necessary to figure out your brand’s unique selling point and design your logo design.