As usual, I get tired of my phone after about 6 months. Need a change. I have read many, many launcher reviews, but I thought I would parse hairs and ask the question simply. Apex or Nova? Why? What does one offer that the other doesn't?
I have never used Apex but I've been using Nova for about a year now. I can't say enough good things about the options available on Nova. Very dependable, fast and updated as needed by the developer.
I haven't used Apex either, but I'm generally satisfied with Nova. My 2 cents worth:
They both have free versions, right? Try one for a few days, then install and try the other. If you like the first one better, switch back. You can have multiple launchers installed at the same time.
Or, if you're likely to get bored with it in 6 months, flip a coin. In 6 months switch to the other one.