Worth upgrading the stock lenses in high-end sunglasses reps? Looking for feedback from people who have compared them

I currently have six pairs of sunglasses in my agent's warehouse I'm considering upgrading the stock non-prescription lenses before shipping them out. I haven't really heard of many other users doing this for non-prescription lenses, so I'd love to get others' thoughts on this. I want the wearing experience and the visual appearance to be closer to authentic high quality sunglasses, particularly in terms of clarity, polarization, glare reduction, backside reflections and overall comfort. I also think quality lenses could make the sunglasses look closer to authentic than a stock replica lens lacking AR coating.

The frames I have are:

* **JMM Dealan Decade, green lenses** Authentic version generally uses premium green sun lenses with backside anti-reflective treatment. * **JMM Borodino Decade, black/silver** Authentic version uses polarized gray-gradient mineral-glass lenses with backside AR. * **JMM Ascari, black/black** Authentic version uses dark CR-39 sun lenses with backside AR. * **Loro Piana André** Authentic version uses premium Barberini mineral-glass lenses with anti-reflective, hydrophobic and oleophobic treatments. * **JMM Ayrton Senna 1992, brown lenses** Authentic version uses polarized brown crown-mineral-glass lenses with backside AR. * **JMM Jules Decade, black** Authentic version uses polarized gray-gradient mineral-glass lenses with backside AR.

I'm hoping a seller such as Cindy can replace the stock lenses with upgraded non-prescription polarized lenses that include UV protection, anti-reflective coating and other coatings. I reached out to her to confirm prices but haven't heard back yet.

The downside is that I would lose the JMM or other branded etching currently on the front of the replica lenses. Tbh I think upgraded lens quality from the standard rep lenses and the fact that people insert custom lenses in authentic frames would make up for that potential callout. I also care more about the actual wearing experience than passing a very close authenticity inspection, but I also do not want to sacrifice the etching if the improvement is only minor.

For anyone who has owned or handled both authentic JMM/Loro Piana sunglasses and higher-tier reps:

1. Are the stock lenses from TDs or 1688 sellers noticeably worse in actual use? 2. Do upgraded polarized lenses with backside AR provide a meaningful improvement in clarity, contrast, glare reduction and eye comfort? I'm used to polarized sunglasses and I live on the beach. Should I ask for other coatings or treatments? Anybody have a brand rec? 3. Does the difference become particularly noticeable while driving, near water or with sunlight behind you? Do you think others would notice it? 4. Would you sacrifice the branded lens etching for better optics and a sometimes-visible AR coating? 5. Has anyone ordered upgraded polarized lenses from Cindy or another seller and compared them directly with the stock lenses? 6. Are seller-provided upgraded lenses actually high quality, or would I be better off having an optical shop install plano polarized CR-39 or Trivex lenses after receiving the frames? I have seen a few comments where people simply state it isn't worth it to upgrade non-RX lenses, but I'm not really sure why. I sourced each frame for between $23-$45, so I think I have a little room to noticeably improve their quality while keeping the cost reasonable.

Any insight would be appreciated. Thanks!