2 Indian Stamps - Same Stamps?

Hello
I noticed these stamps in my collection. The image is in different sizes, but the catalogs assign only one number.
What do you think, the same stamp?

Different stamps
One issued in 1976 and other one in 1980 (Scott numbers 673 and 847)
Don

Thank you

This is what I found in Scott 2014:





The 847 refers to a cotton image.

Look at Scott 673, 674, and 675. The 2013 catalog has a nice description of the 3 varieties of the 25p. It appears you have 675 (large portrait) and 674 (small portrait)

I found it, thanks. Didn't understand all: What's with the points and what's with the top? What's the dif between the stamps with the same image?

Scott:
Three types of 25p Nohru
Type I. Size at top, 25mm Character below
NEHRU has 2 lower points.
Type II. Smaller portrait. Size at top, 23mm.
Character has 3 points.
Type Ill: Portrait as in type I Size al top.
25 'hmm. Character has 3 points.

And BTW, whats the story behind the variations?