The Cylons should have been disqualified right off the bat. The Cylons are robots, entitely aritificial intelligences, as opposed to Cyborgs (a man/machine fusion).
What's more when you get into the basic concepts of the respective series, when you omit all of the trippy space angel stuff they through into the new Battlestar Galactica to try and wrap up the series in a profound way when they had no frakking clue what they were doing, the basic Cylon threat was more a failure of humanity. You basically had a genocidal machine uprising, humanity won, but then due to morality decided "we are going to show mercy and spare these maniacs", creating a peace treaty which was admittedly "violated" by a handfull of people who still had a brain keeping an eye on them, people who were basically ignored due to moralists making "peace at any price" arguements and not wanting to accept the continued threat or the central problem of what amounted to genocidal robots. In some respects BSG mirrors modern right wing vs. left wing politics, in the way we tend to ignore threats by foreign powers for moral reasons, demonoize the destruction of entire cultures and ways of life that happen to be a threat to everyone else, and other things while those groups continue to build up. An example of sorts with be "North Korea" we laugh at them while they build failing missle programs and threaten to nuke the US, but we pretty much continue to let them exist and keep plugging away at it, it won't be so amusing if they succeed due to sheer "can do" attitude and actually DO develop the technology to start launching missles into the US. It's similar to how in the "new" Battlestar Galactica people ignored the Cylons until they developed infiltrators, viral weapons to shut down technology, and a huge space fleet, and attacked. On some levels it can be taken as a sort of warning about our attitudes towards groups like North Korea, China, The Middle East, etc... albiet through analogy to not offend anyone. The original BSG also had these elements which pretty much came down to a less developed "hey, the Cylons have killed everyone else, but let's believe they want peace... it's the moral thing to do to lower our defenses and open negotiations" that didn't end well, and pretty much the one ship full of militants who didn't entirely stand down became the last hope for humanity... whether you agree with the political analogies or not (and most here will not) the bottom line is that not only are the Cylons not really cyborgs, but artificial life (as far as I understand it) but they only represent a threat because people were morons in dealing with them. It's more a matter of "look at how stupid we were, and the mess we got into", leading to tales in both series about how a handfull of military people who did their job are left trying to protect the last surviving human civilians from the result of their own stupidity which brought humanity to the edge of genocide. I mean there is kind of a reason why everyone is kind of busting Adama's stones for being a "paranoid" at the beginning of the new series in paticular, while he keeps his "flying museum" combat ready, only to find out he's right, which should have been kind of obvious when you look at the big picture, but it goes to say that even today in real life people don't want to see it.
At any rate, when it comes to "The Borg" it should be noted that they represent a threat that even with very intelligent and motivated action... pretty much every galactic empire there is rapidly coming to the realization that there is no negotiation here, and putting them on a "kill on sight" list, these guys keep coming, and coming, and becoming increasingly stronger while attacking on new and exciting fronts like time and experimenting with transdimensional technologies just to try and kill/adapt everyone else. They are like cockroaches, something you just can't get rid of no matter how uniited you are, except in this cases the cockroaches are aggressive, intelligent, have adaptive technology, and the abillity to not only decimate planetary populations, but become stronger by doing so.
Now if you want more of a cybernetic threat a better match up with have been to put The Borg up against the Daleks (who are organic, and rely on a symbiotic relationship with machines to survive) or perhaps the old school "Mechanoids" created by Palladium, before they got a little more common sense and made them more realistic/common sense oriented when they were brought into the RIFTS era. Old School Mechanoids were pretty much "yahoo" science fiction at it's finest with the then less seasoned writers talking about fleets of like 40 billion ships fighting and dying without any conception of how big those numbers were (as well as some rather bad math when it came to space travel speeds if I remember because that really wasn't the point so much as "hey look, murderous cyborgs that have already conquered 5 galaxies and turned them into non-stop production factories and now their armies are coming for you!). The mechanoids are not only blobs linked into ginormous cyborg bodies, but also happen to be highly psionic.
