It is worth noting that the module in the first picture was from a few years ago, produced at Jiangnan, and was a demo module, not an actual real module for an actual carrier...
Whereas the carrier at Dalian is... well, an actual carrier and it's not being produced by Jiangnan (obviously).
So I wouldn't place too much weight on comparing the two, because they're so different in terms of what they're meant to be.
I'm not so sure about that, the whole point of a demonstration module is to demonstrate the shipyard could build what the designers designed. Otherwise what's the point in building the module at all?
It would not have been some random design they pulled off the internet, but rather a section from an actual design proposed to the navy, and this demonstration module would have been part of the bidding process, to convince the navy that the shipyard could actually deliver on the design they proposed.
The odd thing is the Jiangnan module seems to have a much shallower hanger deck, being only two decks deep, whereas the Dalian design is 3 decks deep.
The decks of the Jiangnan module would need to be 3m in height (which is a bit more than typical for a warship I believe) in order for the hanger to be high enough for the 5.93m J15, and even then its a very tight squeeze!
That makes me believe the Jiangnan module isn't a carrier test module, or at least not for a carrier able to handle J15s.
In all likelihood, I would say that test module is for an LHD rather than full carrier.
If that is the case, I may need to revise my long-held view that the PLAN would start the construction of a second, different carrier design at Jiangnan shortly after, or during the construction of 001A at Dalian.