Jun is the manager of the RL store. I have talked with him a number of times, and he always is looking out for the best interest of the customer. Funny enough, I don't get that personal experience with any of the other brands. Not good or bad necessarily, but there is personal touch to RL that I like.
That said, you are correct the RL closed bottom is not the same leather feel. Feel is much different than quality of leather. The closed bottom are oil waxed, so you get that slick more smooth feel. They also don't patina like the open bottom version that is not oil waxed. It's not bad leather, just you prefer the other more raw tanned leather feel.
I feel like there are tiers here. Bullstrap and RYAN London as far as mass production leather cases go, are the top tier. The open bottom of RL and Bullstrap open and closed that is. The next tier is the RL closed bottom and Andar. I believe RL holds a slight edge here. The bottom tier is Nomad, Mujjo, Decoded, and Bellroy etc. Not bad cases, but not even close to top tier. Some of these cases are very overpriced for the quality you get.
The price plays are large part in how hard these brands are treated. Bullstrap gets a lot hate because they are far and away more expensive than the others. They have to produce some really quality cases at the prices they are charging. In the same vein, you feel like the RL closed bottom is rather pricy for the quality. Fair enough, so you hold them to bit higher standard. I can understand that, but remember your case of choice Goldfinch is cheaper than several other offers. That means you are less critical of them. Don't forget as well, you have the 15 Pro Max and don't have the worry of the CC button. This has caused these cases to be a bit off their games this year. This year it's rather hard to give a ton of praise to any of them. They all lack a bit or are way thicker than before.