In shallow water Lolong would win in more than 70 out of 100 possible confrontations with a Great White Shark like Deep Blue.
Reasons why Lolong will win in shallow water
Lolong is much bigger than Deep Blue in body size.
Lolong is accurately measured at 6.096 metres (20 feet ) in total body length at straight line and the weight according to a log weighting scale accounting for the trailor weight was 1075 kgs (2370 pounds)
While Deep Blue is estimated only at 18 feet (5.48 metres) long in total body length and weighing between 4000 to 4800 pounds (1814 to 2177 kgs).
Armor plating of Lolong
Lolong’s hide or bony armored scaled skin is much thicker for a Deep Blue jaw’s bite force to cause a damage.
Bite force advantage of Lolong
Bite force of Lolong is estimated at 7700 psi ( 53098 Newtons).
While the bite force of Deep Blue is estimated at just 3473 psi ( 23950 Newtons).
Hence I believe Lolong would win in shallow water because of advantages of size, bite strength and body Armor.