I think it’s impossible to say for sure if that’s from Eden. I’m sure if you’re doing everything else correctly then the Eden products are definitely helping. Ultimately I am going to assume that both trees have a good amount of foliar mass to drive the root growth.
I have seen similar root on some of the EWPs but I also have had a few that have putted along. Even with my trees I development I have switched to a mostly “organic” liquid (fish hydrolysate, kelp mix) based nutrition and the timing seems to superseded everything else including dosage.
So I don’t know if you can get a straight forward answer, unless you A-B test it and get another one and don’t give it Eden.
Either way sounds like you have them in a good spot and keep doing what you have been doing.
On the slower trees that are putting along you could try hydro and super carb, if you are organic. And see if they push harder. I am finding some things really respond well to super carb/hydro drench.