I asked google what factors are used to
define reliability of LED lights:
LED Systems Reliability
"Failure of electrolytic or film capacitors is a leading cause of driver failure"
types of reliability failures:
from this info it seems potting is not a primary variable to reliability. The main failure seems to be a component failure in the driver, specifically, the capacitors in the power supply.
But if potting is an important feature, the black and green body colors of the 2020 AAA Sofirn C01 are potted.
HDS lights are potted, they recently changed sources for their power supply. They had several power supply failures in a batch of lights a couple of years ago. All fixed for free under warranty.
So, I will add that reliability can mean the longevity of the company, for warranty, and the availability of replacement drivers, over the long term.
but for an AAA light, the cost of replacing the whole light is similar to the cost of just a driver for other lights.. so, I would say, choose whatever AAA light has the features you want. If the light dies, buy another light, or hope for warranty service options.
In my experience, all my lights are reliable. I have never had one die, for any reason. I have never had a warranty service claim either. (nor do I buy expecting a need for warranty service).
The worst reliability experience I have had is with twisties, that flicker or skip modes. This was caused by too much lubrication, getting onto the pill and interfering with good contact from the end of the body tube.
wiping out the excess lubricant, solved the "reliability" problem.