The 978 almost certainly will include Sub EQ HT... every other AVR or pre/pro which has MultEQ XT32 also bundles Sub EQ HT.

BTW, Sub EQ HT does not EQ multiple subs independently, as you implied in your previous post. What it does do is calibrate independently the delay and level for 2 subs (to maximize their combined output at the main listening position). It then EQs their combined output as a single "virtual" sub.