Yes, LBs score more than DLs -- in most leagues but the dropoff after the top DLs are huge. I would go with Tuck. I have Von as the #16 LB where Tuck is the my #4 DL. How many IDP keepers does each team have? If it is only a few I would go with Tuck if it is 6+ I would keep Von because of his youth and upside. Just my $0.02.
I drink because of the 1998 NFC championship game.
12 team big $$$ non PPR league - QB RB RB WR WR TE D K
RB: Murray, Matthews, R.Bush, D. Brown
WR: Julio Jones, Colston, VJax, Garcon
TE: Witten, Gresham