Green or Knox in the Flex for Week 1?

[DemonDeacon]

We start 1qb, 2rb, 2wr, 1te, 1k, 1d, 1 rb/wr/te. 3pt bonus for 20+yd tds, and 6pt bonus for 40+yd tds with 1ppr and 5pt bonus for 100yds rush/rec

Romo, Ryan
Turner, Greene, Foster, Felix
Calvin, Smith (Car), Knox, Gaffney
Miller, Heap
Buehler, Gould
Saints, Bears

Strict Rosters restrictions, have to have 2qbs, 4rbs, 4wrs, 2te, 2k, 2ds, no wiggle room at all. no more no less. Im startig Turner and Foster at RB and the debate right now is between Knox and Green. With the big bonus pts and ppr vs Detroit in week one im having a hard time wanting to start Green. WHIR