Add 'Comparison with scratch.vim' section to readme

Author: aiya000

README.md

@@ -58,6 +58,21 @@ Of course, you can open other file types too!
 :QuickRun
 ```
 
+## :scales: Comparison with scratch.vim
+
+[scratch.vim](https://github.com/mtth/scratch.vim) is a great plugin.
+However, vim-scratch-buffer adds more features.
+
+Compared to scratch.vim, vim-scratch-buffer provides these additional features:
+
+- Open multiple buffers with sequential numbering
+    - When you want to take notes on different topics, scratch.vim only allows one buffer
+    - See [`:ScratchBufferOpen`](https://github.com/aiya000/vim-scratch-buffer/blob/736eef08b531b91c95497917ddb97ffbc2047c73/doc/vim-scratch-buffer.txt#L86)
+- Choose between writeable buffers or temporary buffers
+    - See [`:ScratchBufferOpen`](https://github.com/aiya000/vim-scratch-buffer/blob/736eef08b531b91c95497917ddb97ffbc2047c73/doc/vim-scratch-buffer.txt#L86) and [`:ScratchBufferOpenFile`](https://github.com/aiya000/vim-scratch-buffer/blob/736eef08b531b91c95497917ddb97ffbc2047c73/doc/vim-scratch-buffer.txt#L120)
+- Specify filetype, opening method (`:split` or `:vsplit`), and buffer height (width)
+    - Filetype specification enables syntax highlighting
+
 ## :gear: Other Features
 
 ```vim