Chandrayaan - indian mission to moon

What do GSLV and PSLV has common apart from being from ISRO?

PSLV will carry chandrayaan-1 and GSLv will carry none. But that's the difference, i asked what is common between GSLV and PSLV?

Its vikas engine!!! The Vikas engine, based on the French Viking engine developed for Europe's Ariane launcher, is used in the Polar Satellite Launch Vehicle (PSLV) as well as the GSLV.

The ISRO has farmed out the manufacture of the engine to three Indian companies: Machine Tools Aids & Reconditioning of Hyderabad, Godrej and Kerala Hitech Industries Limited (Keltec) based in Thiruvananthapuram. The final assembly of the engines and the stages is, however, carried out by the ISRO. The PSLV requires only one Vikas engine (for its second stage). The GSLV, on the other hand, needs five such engines: one for each of the four strap-ons and one for the second stage. The second stage employs indigenously manufactured Vikas engine and carries 40 tonne of liquid propellant — Unsymmetrical Di-Methyl Hydrazine (UDMH) as fuel and Nitrogen tetroxide (N2O4) as oxidizer.

It generates a maximum thrust of about 724 kN!!!