Why vim pasting behaves differently depending on yanking method

Question

I see different pasting behaviour depending on how I yanked a line. I would like to know why.

If I yank a line starting from normal mode:

^v$y

^ to go to the beginning of the line

v to enter visual mode

$ to go to the end of the line

y to yank

Then I use p to paste and it works as expected.

However, when I yank a line starting from normal mode and using visual mode linewise:

Vy

V to go to visual mode linewise

y to yank

And then I use p to paste, I see that the line is pasted below the current line. It is like paste operation is opening a new line first and then pasting there.

Example. Lines at the beginning:

Line1
Line2
Line3. Insert here 

I yank Line2 using method 1.

I move the cursor to the dot of Line3 and press p to paste. I get this result:

Line1
Line2
Line3.Line2 
 Insert here

But when I do the same thing using yanking method two I get this result:

Line1
Line2
Line3. Insert here
Line2

If the contents of the :registers are the same in both cases why pasting works different?

Edit:

Found the answer here

Even if the register contents are the same; the type of register becomes different depending on the yanking method and different register type makes pasting do a different thing.

Answer 1

Found the answer here

Even if the register contents are the same; the type of register becomes different depending on the yanking method. Register type makes pasting do a different thing. And you can see the register type for a given register by typing :echo regtype('"')