Do you have pictures that show the difference between 51L and V951L? Yes.....

Here you can see the pictures of a stainless steel V951L03-1-1BP and a 51L3-1-1BC .   We have done the measurement of the mounting holes with a digital caliper:

• a sample of the 51L3-1-1BC shows a hole diameter of 0.1455” to 0.147”
• a sample of the V951L03-1-1BP shows a hole diameter of 0.146” to 0.1475” .

This means they're exchangeable as the installation instructions advise a panel preparation with holes of 0.144" diameter. Both latches have slightly bigger holes, so this will fit 100% !