There are few points:
- If there is some compression in TIFF it is lossless, in JPEG it is lossy. So depend of the level of compression you can make much smaller file
- Seems like you strip all the meta information when creating JPEG. In some cases this can make significant difference in size
- And last you crop the image so this also decrease the size of image.
P.S. Based on the image name you show meta information for different images.