There is no much difference, they all pays nearly same. You only have 100mhs speed so what is difference you earned -/+0.1$ more or less.
There is only that little difference between using miners like T-Rex on Ethermine and using Nicehush!?
Man,I was convinced by one guy who told me that using Nicehush takes around 5% of payment more with fee and lower hushrate than using T-Rex on Ethermine alone.
I will use Nicehush then,I like payment threshold more.
PS
I have average 92Mh/s with my RTX 3080