Pick by your goal
Compete in powerlifting? Prioritize strength with low reps, long rest and practice on the big three. Want to look muscular and stay generally strong? Prioritize hypertrophy and treat strength as a bonus.
They feed each other; a bigger muscle has more strength potential, so most lifters should build size with some heavy work.
Strength and size are not opposites: a bigger muscle can produce more force, and getting stronger lets you handle more volume to grow. For most non-competitive lifters, prioritize hypertrophy in the 6 to 15 rep range while keeping a couple of heavy compound lifts in the 3 to 5 range. Only go strength-first if you compete in powerlifting.
Compete in powerlifting? Prioritize strength with low reps, long rest and practice on the big three. Want to look muscular and stay generally strong? Prioritize hypertrophy and treat strength as a bonus.
You do not have to choose one. Open with a main compound in the 3 to 5 rep range for strength, then do your accessory work in the 8 to 15 range for size. This covers both in one session.
Getting stronger on your main lifts means heavier weights for your hypertrophy sets down the line, which drives more growth. Chasing size then builds the muscle that raises your strength ceiling.
They feed each other; a bigger muscle has more strength potential, so most lifters should build size with some heavy work.