Hi Seat15c.
Thanks for the detailed specs! I can see that Phoenix has addressed your concerns about the Nest mattresses in your existing thread here.
The Brooklyn Bedding mattress is within out durability guidelines, as you’ve likely already gathered. 
Any concerns about the Bay Bed mattress are similar in the answer provided to you by Phoenix about your Nest inquiry.
This is where testing can be very important. While we can help you break down durability of components and talk about relative feel, ultimately only you can feel what it is you feel on a mattress. My idea of too firm may be far too soft for someone else, etc.
Have you previously only slept on pillow top mattresses? Is there a specific feel you’re looking for from your ideal mattress?
NikkiTMU