Hi mwallbrecht,
You are the only one that can decide which retailers/manufacturers you are interested in visiting but you can talk with each of them on the phone about the options they have available and then decide whether to visit them. Both of them also have some very high quality/value mattresses that would certainly be worth considering although they each carry models that have different designs and features. They both also focus on “all latex” component mattresses rather than latex/polyfoam hybrids but both of them also carry a latex/innerspring hybrid as well that you may be interested in testing.
Latex is a very high quality and durable material no matter which type or blend of latex you are considering and no matter which manufacturer uses it in their mattress. There is more about the different types and blends of latex in post #6 here but the best way to know which type of latex you tend to prefer or which specific mattress is the best match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) is based on your own careful testing and personal experience.
You are certainly looking at some great options 
Phoenix