Hi Watson4321,
I’m sorry to hear that your Novosbed Classic didn’t work out for you as well as you hoped. It uses high quality materials but of course that has little to do with whether a mattress will be a good match for you in terms of PPP. It’s fortunate that you purchased a mattress that had a good exchange/return policy so that you had good options after your purchase and the risk of trying it was low.
The other two mattresses you are considering (the Tuft & Needle and Casper) also have very good return policies as well so the risk of trying them would also be low as well.
It’s possible that both of your “symptoms” may be pillow issues. If the pain continues throughout the day and doesn’t diminish after you get up and throughout the course of the day it’s also possible that there may be other causes involved besides your mattress. There is more about the most common “symptoms” that people may experience on a mattress and some of the more common reasons for them in post #2 here.
As you know I think you are making another good quality/value choice … and congratulations on your new mattress 
I’m looking forward to your comments and feedback when you receive it and have had the chance to sleep on it for a bit as well.
Phoenix