Low pair or 4 to an outside straight in Double Bonus?
Keep the straight draw. On 10/7 Double Bonus 5-6-7-8 is worth 0.8511 per coin vs 0.7434 for the low pair — the reverse of 9/6 Jacks or Better.
The exact numbers — 5♣ 5♦ 6♥ 7♠ 8♣
EVs are exact — every possible draw enumerated, not simulated — at max bet on 10/7 Double Bonus. Check it yourself: the analyzer runs the same solver in your browser.
See all 32 holds of this hand ranked →Why
Two changes to the paytable flip this hand. Double Bonus pays a straight 5 instead of 4, which makes the draw richer, and it pays two pair 1 instead of 2, which strips the low pair of most of its follow-up value. The identical five cards on 9/6 Jacks or Better go the other way: 0.8237 for the pair against 0.6809 for the draw. Neither answer is a rule of thumb — it is the paytable talking.
Double Bonus chart line #12 of 36 (4 to an outside straight) sits above line #13 (low pair). On the 18-line Jacks or Better chart lines #9 and #10 are in the opposite order. See the full solver-optimized strategy chart, or drill hands with exact-EV feedback until plays like this are automatic.