I wasn't basing that off the list, I thought of it in the middle of making the list and decided to write it.
Aliens do have an advantage in the building area since they can build almost anywhere (not being limited to the floor like the humans) and from what I've seen, they also build slightly faster. In terms of individual structures, however, they are sorely disadvantaged due to the low HP of eggs (compared to repeaters) and the fact that most of their structures fire in a line/cone and can't point at incoming enemies. Their bases can be more spread-out than the humans' but are also extremely vulnerable to weapons such as the Lucifer Cannon (or even a plain old blaster if the attacker has enough time).
Humans' bases are excellent at defense but must be more compact. I have rarely seen a spread-out human base withstand even a single tyrant attack. Their structures don't regenerate but on the other hand, they don't die without a power source. The defensive structures, if deployed properly, tend to be excellent at repelling most attacks.
It's true that humans are less agile than aliens and they don't regenerate, but they can attack at long distances with weapons that do a huge amount of DPS. They also have jetpacks. In my experience, jetpack + Mass Driver = a lot of dead dretches.
The aliens have less class configurations (just six base classes and four advanced classes), whereas the humans have very many configurations (luci + bsuit, for example) that are each suited for different situations.
In essence, the teams are completely different but more or less equal, the exact level of equality depending on the map.