Full ISO vs USB IMG

The .iso is 1.1GB and the .img is 1.5GB.

What is the difference in these two installation methods? Does the .img installer contain more files or more features compared to the .iso installer?

Could I please get some clarification on this?

the difference may be, an iso image can be formatted to a cd your usb is quit capable of.
pretty much can you boot from usb?

ISO is installed from DVD and img is installed from USB. Its the exact same thing when done. Just different install media

OK thanks for the information!!