Ghouly I still don't think you get what I am saying.
The Strigoi has the physical advantage. Yes I agree, they are stronger. However to clarify on this, the difference in strength looks to be the same as between a normal man and a body builder, not the vast difference between a man and a vampire.
Secondly this physical advantage does not equate to 50% or make him equal. If we break down the likely areas (and I am extrapolating here somewhat):
Brute Strength: Strigoi win, no question.
Combat Skill: Blood Dragon win, no question.
Reflexes: Likely Blood Dragon, as he actually spends time honing these.
Damage to targets: Again, likely Blood Dragon as he not only has the technique to correctly apply the blow (which martial arts generally has proven exceeds the power of blows of stronger, less skilled people), but he also has the training to target the weakest spot on his opponent.
It is not a case of equal forces countering each other. It is a stronger, generally enraged animalistic vampire attacking another vampire who has spend his whole undead life training in combat against every foe including beasts he can find.
I am really not sure why there is this need to prove Strigoi are as good as Blood Dragons in combat. Strigoi are good at other things, GW wrote their fluff in such a way to give each Bloodline particular strengths and weaknesses. If you want a tank character, Strigoi are the way to go. If you want a supremely skilled warrior, Blood Dragons are.
I do agree with Irisado to some extent. I don't believe Blood Dragons will slink away like cowards or run, however the latter iterations of Blood Dragons have shown then to be a frenzied when they are not (stupid Blood Knight rules). I think if it was part of an overall tactical plan than the Blood Dragon may do a tactical retreat, as it would not be a sign of weakness, but a feint etc.