So I ended up ordering both and gifting one to my brother.
I definitely prefer the Amazon "Topfit" cable organizer over the Tesla one. It seems to hold the charge connector more securely. The Tesla cable organizer allows the connector to wiggle around in the holster too much for my liking.
The Topfit organizer is also slightly larger, and it holds the connector at an angle closer to horizontal (maybe 60 degrees off of vertical), whereas the Tesla cable organizer holds the connector closer to vertical (maybe 15 degrees off vertical). (See photos below.) So if you're tight on space and don't want it sticking out from the wall an extra few inches, you may prefer the Tesla organizer. But mine is located between 2 garage doors and is up against an unfinished wall, so I prefer having it stick out further so there's more clearance between the cable and wall and the garage door rails. It also allows me to have more slack in the cable hanging down without it touching the ground.
Here are some photos comparing the two:
Topfit:
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Tesla:
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Side-by-side: (The wall mounting brackets are nearly identical. You could replace one organizer with the other without changing out the bracket. They each fit on the other's bracket.)
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