3 reps to failure will be about 90-93% of your 1RM. doing 12 sets gets you 36 total reps. according to prilepins table at that percentage you should be doing 1-2 reps for 4-10 total reps with an optimal number of reps of 7.
4 reps to failure will be about 87-90% of your 1RM. doing 10 sets gets you 40 total reps. according to prilepins table at that percentage you should be doing 2-4 reps for 10-20 total reps with an optimal number of reps of 15.
thats if you want to go to failure for each set. likely you will be going lighter from the start. really the differences will be minimal. the only slight difference i see is if you need more volume or strength for that movement. even then the difference will be minimal. this what i like to call majoring in the minors. being so concerned about the details that you miss the obvious; lift hard, rest hard, eat hard, grow to match your goals.