Torpedo question

[Maerlyn]

I just had a discussion about this with a friend of mine, and we both believe that torpedos are stronger than PPB (as long as there are no shields to be counted in) because they deal the same damage as the PPB deals in two rounds at once. this means they will be faster in destroying components, and therefor will be faster in destroying enemy weapons. even their increased size doesnt really metter. but the main problem we see is:

if you play low tech lvl with high tech cost a lvl 5 PPB will cost 525 000 tech points (including physics 1+2) to be ressearched, a lvl 5 quantum torpedo costs 1 975 000 tech points (including military science lvl 1). now this is a HUGE differens, which makes PPBs far better even without the effect that they ignore normal shields!