I really need to make a BR post.
I'll do this this weekend.

Neither is optimal.
bb/100 is more important regarding BR than $/hr.
If you are making 10BB/100 at 50NL and 5BB/100 at 100NL,
The $/hr is the same, but your variance will he higher at 100NL

Standard deviation determines everything.
The first one is closest to what you should be doing.
The second actually increases risk. (and is nowhere near "low risk")