Technically (yet again) Summorum Pontificuм does not admit or even mention anything about Quo Primum.
Directly, I agree, Quo Primum isn't mentioned, but the 1962 missal is the legal "child" of Quo Primum, so indirectly, yes, if you mention the 1962 missal you are referencing Quo Primum (and nothing else). It's like if one mentions the "1st Amendment and free speech". Technically, you didn't say the word "constitution" but the 1st Amendment can ONLY relate the the Constitution. It goes without saying...
(p.s. Quo Primum was printed in the first few pages of every missal for hundreds of years up until 1960. Until then, everyone knew what this docuмent was. Nowadays they do not, but that's because the modernists want people to stay asleep, which is why they only refer to the 1962 missal and not QP specifically).
With the motu, the Tridentine Mass is permitted unless forbidden, whereas before it had been forbidden unless permitted.
Ok, yes. But when I say SP was an expansion of the indult, i was talking about having the same conditions, which is the acceptance of the new mass. Sorry for not being clear.