Yes consistency is important as you explained, because it helps to build a better brand presence. A great solution is to combine both elements into your business practices. Why?

• With speed, you're always few steps ahead of the competition.
• With consistency, you're able to maintain the lead that you're building with your speed!

In the end of the day, everything matters for a business to truly succeed. It all boils down to how we as entrepreneurs can utilize each trait to its maximum efficiency.