PSP Vault snatched some new details about Grand Theft Auto: Vice City Stories from Australian magazine Gamepro.

According to PSPV, which cites the mag, the game will have you playing as Victor Vance, Lance's brother. You may remember Vic as the guy who gets mowed down by a SWAT unit in the opening scene of GTA: Vice City.

Hit the jump for the rest of the skinny. Brian Crecente

From the site:
The game takes place in 1984 - two years before GTA: Vice City
Victor is a 28 year-old US Marine
Players can now take on the water of Vice City With jet ski's!
The animations are more life-like and is a ''step-up from previous titles in the series''
A multiplayer feature similar to the PSP version of LCS is in the game
VCS is ''much, much bigger than Vice City''
Some landmarks are half-built or yet to be refurbished to their state circa 1986
There's new or altered locations and buildings
All new vehicles and weapons
You can fly helicopters!
Radio stations from Vice City make a return
New weather effects that could include hurricanes
You can swim in the game!
Bikes handle better than before
There's also no more seamless exterior-to-interior gameplay as seen in LCS (There'll be a slight loading time)
A new addition in Vice City is the chunder-wheel, which you can ride in first-person view!
Binoculars is in the game
LCS is ''rookie first-gen PSP title compared to VCS''
Draw distance is great and is said to be better than Vice City on PS2
Trip skips make a return (If you die or get busted a taxi will take you back to the location where you received the mission from)
New animations which give both the lead characters and pedestrians a whole new degree of humanity
Far richer color palette that brings sunsets to all new levels of beauty, and realism
Increased density of pedestrians, cars and objects
Reduction in clumping (where groups of the same model type appear together)
Far more interiors that its predecessors

Vice City Stories Info and Screenshots Revealed! [PSP Vault]