Lantus likes a fairly consistent 12 hour schedule; ProZinc is more tolerant of erratic schedules.
Lantus upfront cost may give you a heart attack; ProZinc looks more reasonable, but you need to compare cost per unit of insulin.
- Tip: get Lantus from Canada when you have time to get the cost more reasonable.
Lantus works best with the same dose every shot. ProZinc, once you have mid-cycle test data, can be used on a sliding scale to accommodate fluctuations in glucose.