I would just change the sheen unless you want more contrast. I would not use White Opulence in this situation because they are both too close but too different. It would be just "off" in that head scratching way. Now I do know White Opulence very well,as I've used it for all my trim and all the kitchen cabs in this house.

You're correct that the slightest difference in whites sets a tone for the home. I think the undertone of your home on the exterior should match somewhat with the interior. Does your interior carry warm undertones? If so I would choose a trim that reflects that. Personally, I like the hale navy color, but I tend to favor paint schemes with more of a cool undertone.

I love simply white but in a bright interior it looks very white. I really really love ivory white for walls if you want something softer, but I’m not sure if that’s what youre going for

This HOA also calls for Extra White with a Silvermist exterior (4th house paint scheme): https://www.thefoothillsmonroe.com/preapproved-paint-color-schemes