Just to put it together ... IMO the detail shots and -even not good in quality - overall views of aircraft 01 are proof enough, that this is a real aircraft.
Regarding that "un-numbered" aircraft from the clearer picture I'm not sure if this is ...
1. a psed standard J-10A with all/most the changes incorporated
or ...
2. a second airframe with a different fit.
I really don't think that these are the same aircraft as ...
- the MAW's are missing
- the formation/slime light on the tail is missing
- the radome is different (at least on both available pictures)
- the IRST/LR is on 01 larger and grey …
- something "happened" to the front-gear ... as to the PL-8 (IMO)
- it doesn't have that "new" wing pylon clearly visible on 01
- the engine's exhaust / afterburner looks like a standard AL-31FN ... in contrast to the other one (even if I would be surprised if CAC would test the WS-10A on a new aircraft !)
- 01 has a "black box" an the rear fuselage (maybe chaff(flare disp.) ... the other one a black dot
So ... let's sit and wait a little bit longer.
Deino
If the second plane is a PS, then all the observations of differences here would then be invalid (e.g. lack of MAWS, AL-31FN nozzle). Only the first plane (marked 01) remains valid.