Where is the worse reliability based on?
Warranty length.
In a nutshell:
up to 2 years - terrible reliability
3 years - poor reliability (e.g Corsair VS/CS)
5 years - mediocre reliability (e.g Seasonic G12, Corsair CX/CXF)
7 years - good reliability (e.g Seasonic Core/Focus GM, Corsair TX/AX)
10 years - great reliability (e.g Seasonic Focus GX/PX, Corsair RMx/HX/HXi/AXi)
12 years - superb reliability (e.g Seasonic PRIME)
TXm has 7 years of warranty, on-par with Seasonic Core/Focus GM series.
If Corsair would have more trust on their TX-series reliability, warranty would also be longer. But it isn't.
What good is a PSU, which has almost all the metrics on mythic level, except that it isn't reliable (e.g 1 year warranty), compared to the PSU that doesn't touch the sky with it's metrics, but is built solid and is very reliable (e.g with 10 years of warranty)?
Or in other words, glass cannon or sturdy workhorse?