The math is easy.
Assumption : 90% of electricity use is off peak (9PM -6AM and weekends).
1000 kWh per month usage.
TOU is $23 cheaper off peak usage for those like us that charge EV's and do laundry off peak
TOU is $6 more for the mid peak and peak usage
Total savings TOU vs Tier is $17/mo for those that aggressively organize their usage for 90% off peak like we do