What is the difference between 7.65 browning and 7.65 luger?

none, they are the same caliber.

Answer:

There are several ddifferences, A comparison of the data is given below:

Luger

Case type Rimless

Bullet diameter 7.85 mm (0.309 in)

Neck diameter 8.43 mm (0.332 in)

Base diameter 9.93 mm (0.391 in)

Rim diameter 9.98 mm (0.393 in)

Case length 21.59 mm (0.850 in)

Overall length 29.85 mm (1.175 in)

Browning:

Case type Semi-rimmed, straight

Bullet diameter 7.8 mm (.309 in)

Neck diameter 8.5 mm (.336 in)

Base diameter 8.6 mm (.337 in)

Rim diameter 9.1 mm (.358 in)

Case length 17.3 mm (.680 in)

Overall length 25.0 mm (.984 in)