Simple rule:
Choose LiPo for Drones, RC Cars, and FPV. You need high burst power (C-Rate) and light weight.
Choose LiFePO4 for Solar, UPS, RV, and Security. You need long lifespan (2000+ cycles) and safety, and you don't care about weight.
Racing/Freestyle: Go for 100C or higher. You need that instant punch to prevent voltage sag.
Cruising/Long Range: 60C is usually enough. It's lighter and cheaper.