While reading some recent discussions I began to wonder about whether the single player and online multiplayer components of Sins are, essentially, completely different games, not in terms of the mechanics of the game, but in how they actually play out.
In the single player game people might play locked teams FFA or FFA with diplomacy. While FFA isn't rare in online multiplayer, it isn't the preferred game type and it's often played with locked teams. When the teams are unlocked sometimes it morphs into an outright team game (ie, 3v3) or if diplomacy is used (let's form a truce and attack so-and-so) it has to actually be maintained between the allies. (You can't just merely destroy 10 enemy structures or feed resources, rather you have an intelligent and possibly cunning "ally" who might want to stab you in the back.) Most online multiplayer games are locked teams 2v2, 3v3, 4v4 and 5v5.
In the single player game you can play campaigns that can go on for hours whereas most online multiplayer games are over in an hour-and-a-half. Having three human allies in a team game makes cleaning up your opponent much faster once it's been decided than if your allies were AI. Also, human opponents can read the tea leaves and recognize when a game has been decided, say "gg", and quit or surrender.
In online multiplayer you can type-chat with your allies, coordinate teamwork and two-fleet attacks, and even use real voice-over-IP voice communication--you can talk to people. The single player game lacks that completely. "I'm worried about Planet so-and-so" just doesn't compare to this dialog:
Team 2: Why are you guys chuckling? What do you find so funny?
Team 1: We're not going to tell you what's going on, but let's just say, "It's like a giant space penis slowly approaching you from behind." (Everyone breaks out laughing.)
As far as I know that type of interaction is completely lacking in single player.
In online multiplayer you are liable to actually lose at at least 40% of the time (which means more suspenseful and intense games) whereas win percentages against the AI in single player are, presumably, much higher.
In online multiplayer you can't really play in a "relaxxed" fashion because you are actually competing against cunning human opponents that aren't playing with one arm tied behind their backs (like the AI does). Thus you can't really build a capital-ships only fleet or a mixxed fleet containing non-strategic units. Rather, the challenge of going up against other people forces you to make constant strategic decisions. Since it is a strategy game, choosing to build the wrong units and/or managing them improperly could cost you and your team the game. Occassionally you might be able to play a little "Sim City in Space" if you start out in the "eco pocket" between allies in a team game and your job is to build up a strong economy and feed credits to your fighting allies (who are on the flanks). However, even that needs to be done right. In contrast, in the single player game the computer AI doesn't have the capacity to micromanage its ships and fleets properly nor to choose strategic capital ships and frigates, nor can it choose the right capital ship abilities to level up nor can it use them at strategic times. So, basically, even though the computer might be given extra credits and resources, it really does have its hands tied behind its back.
Given all of these differences between single player and online multiplayer, would it be correct to conclude that they are, essentially, almost completely separate games? Which one offers the greater challenge, the most suspense, and the most intensity? I do encourage people who have never contemplated the possibility of coming online (which seems like 95% of the game's purchasers, most of whom probably don't know this discussion forum exists) to come try the game against real humans and see if they think it's a completely different game.