Don,
Well, if you are really interested, comparing V and R grade guns is about like comparing apples and oreos. A V gun is more petite in the action, and will always weigh less in the middle than the same gauge R does, without wood.
There are no parts that interchange between an R and a V, the lockup is different, the cocking and firing is different, they dismantle differently, and they are usually built of two different kinds of steel. But, they 'kinda look similar.
We have to tie my R down someday, just to see how much, and if they differ in MOI. Every good double gun is an individual, it seems like to me.
Best,
Ted