I do think there is no difference between a technician and an engineer because I believe a technician can do what an engineer do until someone told me, a technician undergoes apprenticeship without any formal education in the chosen field unlike an engineer who deal with evolving problem solving techniques, pattern and design of equipment...is there really l a difference between a technician and engineer?

Just use your dictionary.
Technician- Technologist- Engineer.. all na politics for Naija.

They both belong to the same family. ENGINEERING FAMILY.
CRAFTMEN(NATEB and its Equivalent ) - TECHNICIAN (National Diploma ) - TECHNOLOGY (HND ) - ENGINEERS (B. ENG )
For the fact that you hold a B. ENG doesn't really qualifies you to be called an Engineer. In fact an HND + PGD can be called an Engineer and a B. ENG holder won't be refer to as an Engineer.

The conditions for you to be called an Engineer as a B. ENG holder is that your degree must be up to four years, then you will be qualified to sit for your Nigerian society of Engineers exams, once you are successful you can now apply for COREN directly.
For an HND holder to be called an Engineer you must have pgd and your pgd certificate must be upto two years old before you will be qualified to write Nigerian society of Engineers exams then you proceed to COREN.