Here's a visual comparison, roughly to scale, of a Zero S versus the C1.
As a ballpark, I'd say the Lit C1 has approximately 50% more frontal area than the Zero, and probably 35-45% of the coefficient of drag. So total drag is approximately 52 to 67% as high as the Zero .. call it 60% for a ballpark figure.
Rolling resistance is probably about twice as high for the C1, between the weight and the wider rubber.
At 70 mph, aero drag on the Zero S uses about 8 kW of power, rolling resistance uses about 2 kW, 10 kW total. So the Lit should be around 5 kW drag, 4 kW rolling resistance, 9 kW total.
Again, take it with a pretty large grain of salt ..