Both ranges are wide, so both value and bluff 4-bets earn — but out of position, calls stay purposeful.
The reference tier. 4-bet a tight value range, call with hands that flop well, fold the rest without ceremony.
The steal war's counterattack: your cutoff open, their button 3-bet. Wide meets wide, and they have the seat.
Assumes a standard 3-bet; 4-bet to ~2.2–2.5x the 3-bet. Deep, favor calls over 4-bets — a 4-bet pot at 500bb+ commits you with range disadvantage.