I've bought only the eBay LED bulbs because I wasn't sure what I wanted or of their light output/intensity. eBay LEDs can be a cheap way to try things out, see if we like them.
I had one batch of 6 that had about a 50% failure rate. Of the other batches, I have 10 or so in the RV, they're doing fine after 5 months of light (pun intended) use.
I do think we get what we pay for. I've had color variation and quality issues. But my outlay was also about 1/10th of what it would have been at CW.
Now, I think I know what I want.
So when these cheapies die, I'll invest in some quality ones.