It appears that there have been some upgrades and/or fixes to China’s Chengdu J-10 canard-delta fighter.

If you look at the top (newer) image it appears that an Infra-Red Search and Track (IRST) unit has been added just forward of the cockpit, and that the inlet has been modified from the original aircraft (bottom).

Douglas Barrie thinks that there may have been vibration or air flow instability issues with the original inlet, but it looks to me more like an attempt to reduce RCS in the forward aspect.

Or maybe it’s a buff with photoshop.