Originally Posted by Mrs_Often
Unfortunately this is not enough proof. The Touch firmware for 2.3.1 does not mention a version number. More importantly, if you look at firmware 2.3.2, both the Touch and Glo firmware have the same number.
I'm afraid the only way to find out is to see which version (file size) is downloaded to your Touch. OR, if you purchased your Touch long before the Glo came out, you can know you'd need the Touch firmware.
Followed your instructions re filesize and sideloaded the Touch firmware. Held breath, covered face with hands and peeked through nervously - all updated and cooking on gas.