That is still not actual voltage
If you want to find the actual voltage as of right now, you need to be looking in the sensors section.
But hosnestly, there's not a lot of reason to spend hours searching for that value, since you are not experiencing any problems.
Both RAM stick will without a question be running at the same voltage, regardles of the information porgrammed into the RAM modules themselves.
What the actual voltage is right now, would most likely be both sticks running at either 1.35v OR 1.50v, but not different voltages at the same time