Your business brand is an important part of your image. The amount of customers that come to us and as for a sign and “aren’t bothered” by the fonts or colours amazes us. Keeping a uniform brand / logo allows your customer to identify you more easily. If you have 4 or 5 different versions, it would be easy for your target audience to assume that you are 4 or 5 different businesses.
Below is an info graphic showing the evolution of 2 different brands over the 100 years plus. Its interesting to see the similarities and where the design has changed.