The nose pitot tube is missing too. If this is indeed a new variant (with AESA+PL10/15), it shouldn't have been developed for the 001/002 STOBAR where 3 batches of J-15s already produced, but for the 003 CATOBAR, which is expected to be launched within a year. The only logical explanation is to call it J-15T. Of course more photos from different angles are needed to confirm this.
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Is that particular head on angle of the aircraft enough to determine that it definitively lacks a nosetip pitot though?
As for the CATOBAR J-15s (whether they're called J-15T or J-15B or whatever) -- as you said, they should also have enhanced avionics and weapons etc like J-16/J-10C generation.
But imo it's yet to be seen if they will only be used on the CATOBAR carriers (003 and so on).
One thing that would be significantly more useful is if the new J-15B/J-15T could also takeoff from ski jumps, so that they can cross deck between the CV-16/17 as well as 003 and future CATOBARs.
Because right now the J-15s for CV-16/17 are still vanilla J-15s which lack the enhanced avionics and weapons, and chances are the ones built for CV-16 originally have most of their airframe hours already used up.