Comparison between VT20 & ST30..
-------------------------VT 20--------------------------------ST30
Price ------------------ 71,000/- --------------------------- 90,000/-
No. 3D Glasses -------------1---------------------------------- 1
Contrast Ratio -----------1714:1------------------------------1956:1
Deepest Black -------------0.009--------------------------------0.02
Peak White ---------------51.42------------------------------ 101.06
3D Quality --------------Good Enough-----------------------One of the Best
Phosphor---------------- Fast ------------------------------Even Faster
Crosstalk(3D)--------------Yes -------------------------------- No
Black Levels* --------------Rises------------------------------ Stable
HD pic. quality----------Best in class-----------------------Almost as good 
SD--------------------Above Average-------------------- Better than VT20
2D to 3D---------------Not possible----------------------Conversion Possible
Formats via USB---------Very few-----------------------------Mostly
96 Hz Playback----------Awesome-------------------------Not good at all
RGB Comparison ----------7.70---------------------------------7.87
Color Temperature 
Comparison---------------7.81---------------------------------8.01
Motion
* Note :- Even after black level rise in VT20 it is better or equal to ST30.
Apart from these VT20 has lot of options for picture settings and not to forget THX certification 
