Hi bermannyc,
The Natura Starlight contains 100% natural Dunlop and an organic cotton cover quilted with 8 oz/sq yd of their organic Natura Grow Wool.
The description on their site about the Sunshine says that it contains Talalay latex (they don’t mention whether it’s blended or 100% natural but I would assume that it’s blended) and has a cotton cover quilted with 6 oz/sq yd of their Smart Wool (neither of which is organic). The description also mentions that the latex is “granulated” which would seem to imply that it uses shredded latex instead of a solid latex core which would be very unusual. It’s also possible that the shredded latex is bonded together with some type of resin. If this is accurate then it would certainly explain why it was a lower cost. Their description also says that the cover is non removable.
There is more about the differences between Talalay and Dunlop latex in post #7 here.
The Starlight would certainly make a suitable choice for a child but if I was in your shoes I would want some clarification about the specifics of the Sunshine. Some other sites that list it don’t say anything about granulated latex so I’m not sure if it’s just a mistake in their description or whether it’s accurate.
The innersprings in the Naturepedic would be more “bouncy” than latex but both of them would be a durable choice. There is more about an innerspring support core vs latex in post #28 here.
Phoenix