For me aikido is far more physically effective...because I don't know judo.
Someone once asked a friend of mine who is a shooting enthusiast what was the best pistol for self-defense, he replied "the one you have". A .22 caliber (small for those non-shooters) pistol in the hands of someone competent in its use is more effective than a .44 super mag in the hands of someone who couldn't hit a barn from the inside
Bronson