Obviouslt original starcarft too longer because broodwar was just an add on to the original starcraft. All the programming etc was already done in original, all they had to do was make up some new units and maybe make some simple things better.
Expansions are jst a marketing scheme to make you pay more

i bet they already though of the medics and lurkers etc units when they made original they just waited a few years to make broodwar so you use more money to buy it.
Yep the original one took longer.
While BW you can use the stuff already made on SC and just add the few other things like the extra heros, terrains, and units.
definatly starcraft because with starcraft, they had to come up with the idea, create the units, all the units, terrains, maps, campaign editor, and many other things, brood war was just built off of the ideas of sc, it only has (at most) like 6 new units and upgrades, and the story didnt take as much time as starcraft's story, because sequals are so much easier than the original