Tejas Mk2:
Nose probe eliminated in favour of underbelly probes. Avoids reduction in radar performance.
IRST, MAWS.
Retractable IFR probe.
Large Area Display, Active Side Stick, Light HUD (DLE HUD from BAE, I think).
Canards, Wingtip missiles, 1.35m longer, 300mm more wing spacing, 11...