For the source text click/tap here: Zevachim 90
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The Gemara on our daf raises the question of what to do when these two sets of priorities come into conflict. Should the constant sacrifice be brought first or should the holier sacrifice be brought first?
The Gemara brings a number of proofs in an attempt to clarify this question. For example, on Shabbat the korban tamid is brought before the korban musaf even though the korban musaf is on a higher level of holiness (the korban musaf is unique to Shabbat). Ultimately, the Gemara rejects this proof, as well as all of the other similar proofs, by arguing that on Shabbat even the korban tamid has enhanced holiness due to the fact that it is brought on Shabbat.