don't hold me to the bitrate on the DTS track on Jaws but i'm sure it was half bitrate. will dig a bit deeper and report back
not sure about that signature edition in all honesty. i thought that got the 5.1 remix if i'm honest. I've got the laserdisc that i linked to in the OP
--UPDATE--
DTS-HD Master Audio - English 4893 kbps 7.1 / 48 kHz / 4893 kbps / 24-bit (DTS Core: 5.1 / 48 kHz / 1509 kbps / 24-bit)
DTS Audio - English 768 kbps 2.0 / 48 kHz / 768 kbps / 24-bit