Which one is the more powerful oi zuki (or) gyaku zuki? Karate Myint Kywe (Myoma Myint Kywe)

Which one is the more powerful oi zuki (or) gyaku zuki?
Karate Myint Kywe (Myoma Myint Kywe)

I am 55 years old in April 14, 2015.  I am the karate instructor since 1976 in Rangoon (Yangon). I am the chief instructor and founder of soshiki karate since 1978.
Being a karate instructor for more than 39 years has been a rewarding experience.  Teaching is a lifetime activity and the following article of karate is the one of result of my own research for my karate books and articles.  My focus is primarily in the practical self-defense field rather than tournament training.   

In karate and its variants, tsuki (Zuki) is used generally as a part of a compound word for any one of various punches, and virtually never stands alone to describe a discrete technique. Some examples of use for basic techniques include:

Gyaku-tsuki (逆突き) means stationary reverse punch.
Oi-tsuki (追い突き) means punch with the lead arm (when stepping forward - lunge).

The stationary reverse punch (Gyaku-tsuki) has always felt more stable (maintain good balance) and powerful for me (if you stable the stance and turn the hip, move very fast motion, putting the force of the body behind the punch) when sparring, but if you train both techniques enough I suppose you could get them equally powerful. We'll find any way to add the hips.

We do punch (Oi  tsuki) can add a forward thrusting of the hips/pelvis to supplement the forward momentum.

Oi tsuki is commonly known as the most powerful punch in Karate, because the step puts your body weight behind the punch.  The punch travels outward from the body in a straight line.  It finishes with the oi-zuki in line with your centre of the body.   Oi-Zuki / Oi-Tsuki in itself:

·        Punching arm in front and straight
·        Other arm pulled back and resting on hip
·        Both shoulders in line and facing forward
·        Hips facing forward and open
·        Legs in Zenkutsu-Dachi (70% on the front leg bent, short, 30% on the back leg  to be stretched straight out)

But the reverse punch (Gyaku tsuki) is more powerful and stable, because the rotational force of the hips into the reverse punching along with good balance and stability allows more powerful than straightforward thrusting and when punching a gyaku tsuki depend on a constructed stable base. In the most commonly taught versions, emphasis is placed on the tension of the practitioners' muscles, and movement of the body as a solid, stable unit.