Pretty much my opinion Seri, yes.
Firstly I think parallels can be made between every faction. We can even find parallels between the Minmatar and the Amarr easily (like they both are at least partially anti meritocratic on paper and both have a form of aristocracy). It doesnt make them that close to each other to the point of being buddies.
Then the megacorp = tribe idea is quite stretched in my opinion. As Seri said then a megacorp can be equated to a Holder's lands, or to a fed district/state. The only thing they share is the territorial scale and the fact that they are just below the upper governement in terms of power.
Every faction is incompatible with the others more than it is compatible, or compatible factions would already have more or less merged together.
Culturally wise, I really doubt that the Caldari society would fit the Minmatar very well :
- Asking them to be meek, productive citizens, when most Minmatar have a staunch independant and free mindset, almost "rebel" in essence, where the Caldari average citizen is only a cog in the machine, and proud of it. Community vs individualism -> conflicting.
- Asking them to sacrify their traditions in favor of meritocracy and/or plutocracy. In tribal society, the elder people are revered and hold most of the power. It's kindof like a seniority succession, where it is not merit that is valued, but experience (associated, rightly or not, to the age). And when it is not directly linked to the age, it probably is to the experience. Of course, subtribes are legion, all with their different rules and laws and culture, but still. Meritocracy vs Seniority -> conflicting.
- Probably more...
In terlms of realpolitik and historical events, the Caldari and the Minmatar, at best, do not like each other very much. I wouldnt say that they are neutral or indifferent toward each other at all.
Firstly, the most obvious, the Caldari are Amarr allies, and even if they do not practice slavery, they also have nothing against it except when it breaches their internal laws forbidding it.
Secondly, a lot of caldari megacorps have important contracts with the Ammatar Mandate for mineral prospects on the borderzone, and are often only a step behind the usual skirmishes in the ambiant chaos here.