Here's an interesting translation (by Nathan Scott) of a scroll written by Yukiyoshi Sagawa, which hung on the wall of his dojo. Sagawa was, at one time, asked to be the Soke of Daito-ryu, and he was not a big Ueshiba fan:
"The Martial Art of Aiki is Synonymous with the Way of Human Cultivation & Development"
Aiki is the harmonization of ki.
The entire universe sustains itself perfectly through maintaining an endlessly fluid balance, or harmonization. This harmony is aiki.
It is never stagnant, but rather unites while in this constant state of movement to create harmony without producing negativity or conflict since the ki of aiki is natural.
The harmony created by aiki must serve as a fundamental part of the foundation of human society. This concept is known as World Peace through Aiki (Aiki no Daien Wa).
One should use the principle of aiki to harmonize with and de-escalate those who threaten violence. In the case where an enemy has already initiated an attack, one should rely completely on the principle of aiki to blend with or redirect their attack, which in turn produces a state of harmony.
We must seriously study the basic techniques of aiki as well as the taijutsu (jujutsu), tachi no jutsu (swordsmanship), sojutsu (spearmanship), and bujutsu (staff techniques) as passed down within the methods of aiki through its founder, Prince Shinra Saburo Minamoto no Yoshimitsu, and in the process strive to follow the Way found in the martial art of aiki (Aiki no Budo), which can be thought of as synonymous with the Way of human cultivation and development (Ningen Shuyo).
As to number 1 - that's basically true, although there is quite a bit of variation between schools of both Aikido and Daito-ryu. OTOH, although you could argue over which approach is better pedagogically, in and of itself that says nothing much about whether the principles being covered are the same or different.
For number 2 - that's also generally true, but the same caveat as above holds. In either case, it's really a minor variation at best rather than a substantive change in technical principles. If I have control over what's happening I can wrap someone in close or release them outwards - and remember that releasing them outwards is not always the least damaging option.
From what I can see the differences you are talking about are mostly that Ueshiba was more religious - which is probably true, but again doesn't say anything about whether the technical principles are the same or different.