Hi McJenn,
This is part of the risk of an online purchase that you can’t test in person and in this case the options you have after a purchase to exchange a mattress (or to adjust the comfort or support by rearranging or exchanging individual layers) or to return it would become a more important part of your personal value equation.
They all use high quality latex layers so the quality and durability of the materials would be closely equivalent yes although the designs are different. There is also more about the pros and cons of a thicker mattress and/or having more layers to rearrange or exchange in post #14 here.
This is one of the many topics where you won’t find a single consensus or agreement between different manufacturers but you can see my thoughts about this in post #2 here.
There is more about the pros and cons of a wool quilted cover vs a thinner stretch knit cover where you sleep more directly on the latex in post #6 here. The wool can certainly make a difference in temperature regulation … especially for those who are more towards the warmer end of the oven/iceberg range.
Again … you are certainly looking at some great choices both for yourself and for your boys 
Phoenix