The way in Knives Out that the entire Thrombey family constantly subjected Marta to racism for years ranging from micro aggressions to outright threats of deportation, that she knew all their fucked up dirty laundry and how they all were constantly exploiting Harlan's wealth, that they excluded her from Harlan's funeral and each blamed everyone else for it, and that they immediately dropped all pretenses of condescending civility when the will was read, yet she spent almost the entire movie sympathetic of them and wanting to gift them the fortune Harlan left her before finally standing up for herself in the last hour

Vs

The way in Glass Onion that Helen outright hated the entire "disrupters" group for at least ~10yrs before the movie even took place and made her opinion explicitly known, that her acting as her twin sister being jilted was so easy to maintain because she hated the entire group so much, that she didn't at all humor their extremely conditional "comradery" with her cause against Miles, and that in the end when everything was said and done she didn't stick around to watch them all turn on each other because it didn't matter anymore if they did or didn't

Marta's kindness got her the house.

Helen's justified fury burned Miles' down.