I also have a point to make that I don't really think has ever been discussed. It comes down to whether or not Alucard feeds or not. For all we know, that detail may affect everything. Being that he is half vampire, he craves blood. That being said, if he doesn't feed, he is essentially starving half of who he is which means that he may not have ever realized his ultimate potential. I mean if he is partially starving himself, how can he truly fight at his absolute full potential? I could see him not feeding during the time of SotN and before, but once we get the late 20th century, synthetic blood has been developed. So, depending on the time period we're taking about Alucard may not be able to access his true potential. If the fight was between Julius in his prime and Alucard (who could be drinking synthetic blood), Alucard may be more powerful. Of course, this all assumes that drinking blood affects Alucard's overall power.
This is just a theory though.
By the way, that was a awesome video.