No, 6x and 7x uses the same setting, which is why they have their power in the parenthesis behind the calculation. Most of the time you will get the same value for these, but in case you don't you can choose the one you want.
The 3.4x and 3.5x also share setting, but they also have the same FOV so they are practically identical just differently named.
12x uses the 10x setting, the actual 10x I'm still grinding towards since it isn't available in any Portal mode.
Also there is no 5x scope I think? Correct me if I'm wrong, but I haven't been able to find one.