The tj09 has 120mm fans all around,where the tj03 uses the old fashion x2 80mm rear case fans and 80mm top fan...
Plus the TJ09 has better built quailty (aluminum thickness 5mm/2mm vs 1.5mm)
So the TJ09 would be my fav out of these two cases by a long way...
TJ03
Material Aluminum front panel/door, 1.5mm aluminum body
Cooling System Front 120mm intake fan, 2200rpm, 21dBA
Rear 2 x 80mm exhaust fans, 2050rpm, 21dBA
Top 80mm exhaust fan, 2050rpm, 21dBA
TJ09
Material 5.0mm aluminum front panel, 2.0mm aluminum body
Top 2 x 120mm fan slots
Rear 1 x 120mm exhaust fan, 1200rpm, 21dBA
Mid-section 1 x 120mm intake fan, 1200rpm, 21dBA
http://www.silverstonetek.com/products/p-menu/enclosure.html
(I myself brought a TJ07 because i wanted a good case for watercooling and i love the curved look )