Returning Bluetooth earbuds to Amazon

I'm hoping to buy a pair of relatively inexpensive Bluetooth earbuds to use when running outdoors, to relieve all this pandemic stress and boredom, and, well, because they're the latest must-have gadget and I need something non-essential to spend a relatively small part of my stimulus payment on (the rest goes towards stuff I actually need). I've run with standard wired earbuds over the years and they're ok, but the wires are annoying and get snagged, and having their plug stick out of the bottom of my phone is just awkward.

Anyway, I'm looking to spend no more than $50, and I've narrowed it down to two finalists. One is the M-Pow M30, $37 right now on Amazon:

https://www.amazon.com/gp/product/B0832GH4WF

And the other is the TOZO T6, $45 (after 10% coupon) on Amazon:

https://www.amazon.com/gp/product/B07RGZ5NKS

I'm leaning towards the TOZO, because it's got a nicer case and nearly 10 times as many (mostly positive) reviews, plus there's just something intangible about it that I prefer. But the M-Pow has a slightly higher average rating (4.8 vs. 4.5), sticks out from one's ear slightly less, and has tiny retention "wings" to keep it in place during workouts.

I'm thinking of getting both, trying each out, and returning the one I like less. But, being earbuds, I'm not sure if they'd take them back. The return policy for each is free returns, but only if unused. Obviously, they'd be used, however slightly. I'd clean the tips and buds thoroughly, of course, with soap and water (they're waterproof), so they'd look and essentially be like new. But still, used earbuds, returned, yech.

What do you think, gross, or they won't process a return? And, to those who have experience with one or both of these earbuds, any advice?

Oh, and btw, why is this site urlblocking M-Pow when I remove the dash?