The chinese clone is not an RSP1A, it’s a clone of the RSP1. The 14 bits option is available on the newer RSP1A only.
There are a couple of other improvements on the RSP1A, I had one, but switched to an AirSpy HF+ Dual Port.
The ‘missing’ features of the discontinued RSP1 are not important to me.
Anybody thinking of buying something like this, I suggest the new AirSpy HF+ Discovery, if HF and VHF with 660kHz alias free waterfall are good enough. For ‘DC to daylight’, and up to 10MHz waterfall, the RSP1A is still the best value around.
Actually, the chinese clone is better than the discontinued RSP1. It’s in a metal case, and has a 0.5ppm TCXO. The RSP1 did not include those.