How many days per week are you training on each program?
How close (percentage-wise) to 1RM are you training on each program?
There are a lot of variables here. Everyone is different and has a different sweet spot for hypertrophy gains and strength gains (although those sweet spots tend to be fairly close to other people's, which is why broscience and cookie cutter programs tend to work 9 times out of 10).
For example, I see better overall results with more volume. I did 531 for years and got pretty strong, but when I switched to Juggernaut I kept that strength and improved it, while also seeing better hypertrophy.