WHAT? :o This is an unfair question. Ok here's a quick listing of where i rank the Starcraft/Warcraft games (without the RPG ones and expansions)
1. Warcraft III
2. Starcraft
3. Warcraft II
4. Warcraft
So obviously the later ones are better. On a whole i enjoy Starcraft more as there aren't many RTS's as good as it anymore. I'll now talk about how i felt about each game (i've played each one)
Warcraft: OMG, this game was where the first resource managment concepts came into place (along with Dune 2) the control system was horrible and the story failry boring as it was the first Warcraft game and the story wasn't developed yet. I still enjoyed it a lot, but no where near the fun you'd have with the later versions. The GFX and technology just weren't good enough to make a versatile RTS with. :(
Warcraft II: I used to think the GFX of this game were almost identical with Starcraft's when i was a kid (as far as technology goes). But i just installed Warcraft II again recently and i've discovered the GFX really don't look that good, and the control system is still quite clunky. It's almost has an 'arcadish' feeling to it. Which isn't very comforting at all. I loved the revamped storyline though (that actually leads into Warcraft III) and the gameplay formula was what every single RTS would follow, even up to today (Command and Conquer also set the way RTS's would be). Overall it was a great RTS game but it's evidently dated by the high level GFX of a game like Warcraft III.
Starcraft: This was a change, Blizzard released a game with a similar name to Warcraft, but called it 'Starcraft', how intriuging. Starcraft has got to be one of the best RTS games ever made, it didn't just shape every RTS game ever to be made after it was released, it also stands as an excellent RTS, even by today's standards. It makes quite a few RTS's made today look ridiculous. Easily 5 years ahead of it's time Starcraft is just amazing. :D
Starcraft was a huge change from Warcraft, it brought in new resources, and even though these were essentially new look Warcraft resources, the great thing about it was each race had different ways of harvesting it. In fact each race had different ways of doing just about everything. Gone were the days when each race was basically the same race with different skins and names with small changes.
Every race was completely different: The Terran were practical, and were easy to mobilise into just about any situation. The Zerg were aggressive, and were very easy to overwhelm an opponent, and The Protoss were conservative, and had their best weapons come late in the game. Each tribe had tons of strengths and weakness, and the depth of the game was equisite, it took years for gamers to master Starcraft, as there were always new things for them to learn and discover, new ways to take advantage of the game, and always new strategies to be thought up and excecuted. It also had arugably the best RTS storyline up to that point, and even rivaled the RPG's storylines. ;D
Everything about Starcraft was great, and numerous expansions didn't disappoint, adding many new concepts and features to the game. Although the GFX are starting to look a little worn when compared to the numerous 3D RTS games made today. The speed and the pace of the game will never be lostand it's amazing what Blizzard managed to achieve with a few concepts and ideas as to how an RTS should be.
Warcraft III: It's hard to explain why this game should be classed over Starcraft. It took advantage of what made Starcraft so great, yet kept the same storyline and resources of Warcraft II. The great thing was the 4 tribes all were very unique in their own right (which is hard when you compare how similar the Orc and Human tribes used to be). Each tribe had their own way of building buildings, their own way of mining gold, their own way of gathering lumber. Each tribe had many different features that put it apart from the others. And the greatest thing of all by far were the new Hero units which added certain 'RPG elements' to the game, even if they were very linear. It was great to see what Blizzard had done again, and with superb GFX as well. :)
The game was perfectly balanced and just like Starcraft, the multiplayer frenzy of discovering new tactics and exploiting them was ever present. Warcraft III also had huge mod support and many different mods of the game were created, much to the delight of fans. The Singleplayer campaign was one of the best ever, and the storyline took up where Warcraft II left off, and filled many of the mysteries confronting most players. The great thing was how each campaign, representing each tribe, was progressive, and the storyline and characters from each campaign blended in with each other, much to the help of the excellent hero units.
On a whole Warcraft III beat Starcraft, purely on it's better technology GFX, Sound, and RTS experiance. Both games are great in their own right, and depending on different peoples tastes, some may opt to stay with Starcraft. I personally like Starcraft better as the expansions were much more elaborate when compared to Warcraft III's 'The Frozen Throne'.
I just can't wait for Blizzard to release another RTS game, as they're really something to look forward to. I hope they actually release a Starcraft II this time ;D