Two suited high cards or a low pair?
Keep the low pair. On 9/6 Jacks or Better a pair of threes is worth 0.8237 per coin vs 0.6213 for suited Q-J — the pair wins by 0.2023.
The exact numbers — Q♠ J♠ 3♣ 3♦ 8♥
EVs are exact — every possible draw enumerated, not simulated — at max bet on 9/6 Jacks or Better. Check it yourself: the analyzer runs the same solver in your browser.
See all 32 holds of this hand ranked →Why
Suited Q-J looks like the start of a royal, but it is only two cards: the flush needs three more of the suit and the royal needs three exact cards. The pair is already a made hand with trips, two pair and quads live on a three-card draw. The threshold is one card away — add the suited ten and the three-card royal beats a low pair. Note the middle row too: dragging the queen along with the pair costs 0.1484 — it blocks the third three and adds nothing, since a lone queen cannot pair into anything the pair doesn't already beat.
Chart line #9 of 18 (low pair) sits above line #12 (2 suited high cards). Line #7, three to a royal, is the version that outranks a low pair. See the full solver-optimized strategy chart, or drill hands with exact-EV feedback until plays like this are automatic.