I like your question, it sound like a poem:)))

Hybrid is when a vehicle is running on two or more power sources such as diesel and electricity an example is the Toyota Prius. By blend I am going to guess you mean dual fuel/bi-fuel? this means you can have petrol or diesel and something like LPG. Hybrids improve efficiency, bi-fuels improve flexibility. Mos people would rather have a Hybrid. Any more questions let me know!