Potential dividers in a circuit- electrical engineering

I have been tasked with concluding which resistor in my circuit works better than the other.
However, other than learning how the formula works, and what a potential divider does, from various websites saying the same.
Understanding, what's considered as a good potential divider eludes me.
Both potential dividers for my circuits perform as intended and have a constant gradient. One has a steeper incline suggesting a higher internal resistance, while the other is a lot more shallow.
Is this key to me understanding what would be the better one?
If I knew what defined a good potential divider, I'm sure I can conclude the question well. But, I can't find this information. Anywhere.
Thanks in advanced