I’m a wood floor snob. I would not install engineered floors next to solid Brazilian cherry hardwood.

Is your issue with engineered floor? Would you install solid white oak hardwood floor next to it?

Doesn't matter if it is solid site finished, pre-finished engineered, or site finished engineered wood floors ... that is not a good mix.

If you plan to be here for many years just do it right and start over with the same flooring throughout. You won't regret that choice.

The Brazilian cherry is beautiful of course, but you should have the same flooring throughout. The new flooring won’t be far off the current colour of that room and yes, it looks odd. IMO you shouldn’t be mixing flooring types, wood types AND colours in the same space.

" Do you think it is going to look odd next to Brazilian cherry, given how vastly different they are in color? "

Yes, not only odd but way off base and an obvious miss. I would embrace the B. Cherry and replace the rest of the flooring with matching B. Cherry. Oak will not look right next to the cherry. If you have your heart set on the oak, remove the cherry. However I would, as I mentioned, add more cherry.

The cherry can be refinished lighter but not as light as the trendy European oak. I’m with the others that it’s one or the other- the two will never look intentional in the same space.

My issue with installing engineered flooring next to solid wood flooring is simple - I don’t do ’engineered’ period. But most especially not in the same area as solid wood.

As I said, I’m a wood floor snob. Do it real or don’t do it at all is my mantra.

If you can’t afford to match what is already there, do something entirely different like tile or cork.

Brazillian cherry, aka jatoba, is once again on the rise in popularity. So is golden oak. The pale unfinished look is done for. Deep colors and jewel tones will dominate the next 10 years in the design center, then filter down into the heartland that is 5-15 years behind the trends.

OP update:

This is what I am thinking now.

1. Family room to the right - install 4” Brazilian Cherry (I don’t think 1” difference in width will matter and I don’t want to use glue).
2. Stairs - install Brazilian Cherry stair threads
3. Living room (behind hallway in the photo) - install white oak. The kitchen currently has oak and is connected with the living room.
4. Upstairs - white oak

No, do not mix different colored wood floors on the same level if you can help it.

It tends to look like hodgepodge updates with no regard to a cohesive design throughout the house.

You need one look for the floors throughout. Bite the bullet and make a decision on which wood you love the most. When your steps are not the same wood as the floor it lands on, it looks weird.

Gorgeous floors are a huge factor in having a cohesive home. Do it once; do it right.

One floor ONE WOOD Type. Use the oak upstairs if you much but all Br. Cherry on the first floor.

Ok, thanks everyone! Few more questions, if I may:

a. Will it be ok to use carpet on the stairs, in a color sort of in between BR and white oak, so that the transition to white oak upstairs is not as drastic?

b. The kitchen currently has 2 1/4 white oak hardwood floors. Assuming we will go with BR in the family room and living room, would you also recommend BR in the kitchen or a tile in a different color might be ok?

Tile in a kitchen is always fine, but if you are spending the money to remove the existing wood floors just put in the matching cherry. No one. NO ONE wants carpeted stairs. A carpet runner could be nice and would minimize the change.