Bikkurim, Chapter 2, Mishnah 1. This mishnah sets two groups opposite one another: Terumah and Bikkurim on one side, and maaser sheni on the other. The mishnah opens: "HaTerumah vehaBikkurim" - and lists a series of laws that apply to both of them, and do not apply to maaser sheni.
The laws shared by Terumah and Bikkurim:
"chayavin aleihen misah" - a non-kohen who eats Terumah or Bikkurim is liable to death at the hands of Heaven for eating them.
"vechomesh" - one who comes to pay for them pays the principal plus a fifth. With maaser sheni there is no penalty of an added fifth, for example if one ate it outside Jerusalem.
"va'asurim lezarim" - both are forbidden to anyone who is not a kohen, whereas maaser sheni is permitted even to a non-kohen. And although the mishnah already taught that a non-kohen who eats them is liable to death, it also teaches "forbidden to non-kohanim" in order to set them in contrast to maaser sheni, which is permitted to a non-kohen.
"vehem nichsei kohen" - Terumah and Bikkurim are the kohen's outright property: he may sell them and do whatever he wishes with the money. This is unlike maaser sheni, whose money may be used only to buy food and drink, and in the case of oil, also for anointing; therefore the produce is not a person's outright acquisition, in contrast to Terumah and Bikkurim, which belong to the kohen completely.
"ve'olin be'echad ume'ah" - the measure for their nullification in a mixture is one part in a hundred. Maaser sheni does not require this measure; rather it is nullified by a majority, like the law of most prohibited substances.
"ute'unin rechitzas yadayim" - one must wash his hands before eating them, since unwashed hands have the status of second-degree tumah, and would render the Terumah and Bikkurim third-degree tumah. This is unlike maaser sheni, which may be touched and eaten even with hands that are not pure.
"veha'erev shemesh" - for a person who was tamei and immersed in a mikvah, his immersion alone does not suffice to allow him to eat Terumah and Bikkurim, until the sun sets and it grows dark. This is unlike maaser sheni, which one who immersed that day - who immersed but whose sun has not yet set - may eat.
In summary: "Harei elu biTerumah uvVikkurim, mah she'ein ken bemaaser" - all the laws listed here are shared by Terumah and Bikkurim, whereas maaser sheni, as we have seen throughout the entire mishnah, does not share in them.