The problem with clones is that they're "mystery meat" switches. Most are of an unknown brand and unknown specification, although my suspicion is that most of them (especially those numbered like yours) are from Himake, now part of Hua-Jie. There's a tendency for clones to be very stiff, but there's no way to know what you'll be getting: switches with the same numbering can have completely different internals. This page might help you: most of the switches from T1 on down are unidentified, and many cannot be differentiated from others:
http://kbtalking.cool3c.com/article/8366
You could describe the switches, but that's very difficult to do objectively: you'd need to compare them accurately with a well-known switch.
(You can open the switches to check the insides, but they're a complete nightmare to reassemble, though not as bad as SMK: second gen SMK switches are insanely awful, although they feel great.)
Clone keyboards aren't considered particularly valuable, and they're not that rare. I personally don't have an issue with the build quality, just the terrible stiffness, which is the primary complaint.