the 88 riff is exactly the same as No can Do (it was instantly obious to me too when I discovered EC's gigs some decades ago), but the lick played in RATR is just Mark's typical style with mute strings and chicken type notes, it is not the same riff imho
you can always hear similarities between licks here and there in differents songs, but it's not the same thing to use exaclty an old idea of a riff, or a melody some years later when you are composing a song