I have the eco and I bought the cradle too. The ONLY reason I would get the advanced would be for the humidity pump. I really struggle with humidity, especially at lockdown, with the Eco. It likes lower humidity and I like higher humidity! I don't like having to remove the whole tray to add water every other day and lockdown can be a nightmare for me. Also, I'm not crazy about the cradle. I have bantam eggs and they slip around in the rails and I don't think they get turned efficiently. I'm actually not using the cradle at all with my current batch and doing the turning by hand. I like using my own calibrated thermo's & hygro's so that's a plus for the Eco.
Ruby, I dont understand why they only include the foam strips with the pump, but it came with porous foam strips that fit in the rails and hold the eggs nicely. I'm sure you could make some out of something. I worried about circulation, but I've packed it full and I can't imagine not having them, especially for bantam eggs.