But can you hit 4.0? Your title says "above 4.0"
If so, and temps and voltage are under control, I'd take that and be happy.
Also, as the above poster did, I got a 1600x for that reason, as well as better odds of hitting higher memory frequencies, ( @ 3200 right now), and having no intention of using the stock cooler.
So, for me, it was $30 CDN more for a 1600x. Which made it a no brainer decision.