Since most people here dont seem to understand why Star Gate should be so scientifically advanced, Ill try to clarify.
The history of the Ancients/Alterans/Ori begins, by most estimates, 75,000-100,000 years ago. They had already reached the level of your typical advanced species, e.g. Borg, Fed, Imperial, being adept with learning and wise. This is when they split into 2 philosophical groups, the Alterans (good), who believe in non-interference as they grow more technologically powerful, and the Ori (evil), who encourage religious fervour and the use of weaker races as sources of worship through technological dominance. This soon turns ugly, and the altruistic Alterans (who will now also be known as Ancients) decide to relocate to the Milky Way Galaxy, leaving each side to develop powerful galactic civilizations along differing view-points. The Alterans continue their advancement, creating alliances with other peaceful and advanced species (the Asgard, Nox and Furlings) to mutually develop, while the Ori rule their whole galaxy with cruel but effective religious fervour.
By now, they had learned the deepest laws of physics, and had started reaching not only the final theoretical knowledge, but the practical applications of it. This supreme effort, not only in science, but in ethics/morals, led to the culminating discovery possible by any race. They had evolved enough to perfect Ascension, or moving on from this plane of existence to another which had complete control over this one. This is something the Star Trekkers have seem to only have found through the Q continuum, but it is clear that the Q have degraded from the amazing discovery of their predecessors to the level of powerful tricksters, lacking the moral purity (not used in a good vs. bad sense). Star wars races seem to have a genetic affinity for this plane of existence (excluding the Vong), being able to draw on a feeble connection to it, and even having ascended partway in death, occasionally (Pioneered by Qui-Gon). Still, it is evident that this is no match for the pure connections granted to Priors, religious priest/warriors, by the Ori, allowing ordinary people, if they are religious and loyal enough to them, to have raw power and finesse only dreamed of by Jedi/Sith. In addition, the ascensions achieved are not truly comparable to the real thing, as they could not prevent themselves from being absorbed into this plane into indistinguishable energy, and could not interact significantly with lower planes. Unfortunately for the Jedi, now that the Ancients are aware of, and at war with, them, their minor connections to the Force, as they call higher existences, will soon be snapped!

There is also the point that higher beings can fight against each other in ways unimaginable by the lower planes, and considering that the Q have decayed, while the Ancients have progressed, and the Ori are worship-enhanced, the Q are in for a far greater humbling than in Deja Q

So, thats some dirt on the Ori and Ancients. Another fact is that the Ori can gain a stronger influence by having people worship them, and it is estimated that two galaxies populations would be enough to grant them total power. Also, the Ori s empire has attained a technological level even higher through divine revelations of the priors, enhancing their battle fleets, weaponry, and holy warriors. In the other galaxy, the Ancient technology was shared with its allies, and what was left behind by the Ancients also improved these groups tech. As a final factor, the Replicators have fine tuned all these technologies as only block-based rapidly adapting mechanical bugs can, sometimes finding significant improvements.
All in all, this should help show that Star Gate has the most advanced technology physically possible in any galaxy, along with a relation with the higher planes of existence, and that they are massively superior in all but numbers.