The foreign trade version of the J-10CE and PLAAF's own version, the J-10C, they have no difference in performance. There is no such thing as a “Block 20” version.
PLAAF's own version of the J-10C has some minor upgrades and tweaks for each production batch. These do not make a significant difference to the actual effectiveness of the fighter.
PAF's 20 J-10CEs were delivered in three lots. Each lot has minor differences and adjustments. This is a normal measure within the general range. Even for fighters that have already been delivered, some minor minor adjustments and upgrades can be made.
The PLAAF's own version of the J-10C is positioned as an air superiority fighter.
The foreign trade version of the J-10CE has a choice of different configuration lists and tuning between air superiority configuration, ground/sea configuration, and multi-mission configuration, depending on customer requirements.
If the customer also chooses the Air Superiority version of the J-10CE, they are no different from the J-10C.
The picture you provided a link to is of a J-10CY, which is the exclusive fighter of the PLAAF 8-1 Air Show Team. Due to the special requirements of aerobatic performances, this fighter is a special modification based on the J-10C, not an official model. In addition to minor differences in appearance, the J-10CY is powered by an AL-31 engine instead of the WS-10B. this is related to the power output curves of the two engines.
J-10CY is now officially operational. However, the quantitative needs are minimal. It belongs to the range of special modifications.
It is generally accepted that the J-10D refers to the electronic warfare-specific version of the J-10. It has a large bulge in the belly. Note: J-10D is not an official code. It's what Chinese military fans call it.
The fighter jet was once exposed on the Chinese Internet.
However, PLAAF did not procure the fighter. Because they have J-16D with better performance.
Currently it has no further news. CAC may launch this version to international customers if any foreign customer is interested.
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