Difference between 2 Indian coins

Hi,

Could anyone show me how to tell the difference between these two coins?
https://en.numista.com/catalogue/pieces22399.html
https://en.numista.com/catalogue/pieces4854.html

I've got one from 1943, which could apparently be either of these two. Is it to do with mint marks? I can't see any on mine, but I don't know where to look...

Thanks!

 Yes - kommodore beat me to it. The information is mentioned on each page! That KM# 546 has a reeded edge, and KM# 547 has a security edge.  

P.S. I have now made a note on both pages about the edge change in 1943 - thanks.

And a slight difference in weight.

Aha, thanks both. I must have overlooked the Edge section, but otherwise I compared the pages pretty thoroughly, hence the confusion!

If you look at the pattern on it, or the circle in the middle, on one the text is quite compact, whereas the other is spaced out, so really it is just a change in that floral design, or the edging.