This shows my existing downstairs and stairs and what I am considering. Am not sure if the LVT will be too dark for my liking for the upstairs.

Correction: Not LVT - should be LVP - planks

The guidance for floor colouring/materials is pretty easy to deal with when it comes to different levels in the home (assuming it isn't a split level). The upper level of a home is often a different material or a different colour. That is both normal (to see) and allowed (in design circles).

The stairs, as you have pointed out, should match the 'main living space'. You already have that. So you are already set up to do what you want with the upper level.

The LVP looks to be a 'tone-on-tone' type of colour compliment. I'm in favour of that idea. I find it looks a bit more sophisticated then a completely different colour upstairs. But I digress. You will want to be aware that LVP/LVT does NOT like underpad. That means if you want/need noise reducing underlayment (like cork or felt) then you cannot use vinyl. You just can't put a pad underneath and hope the noise goes away. Vinyl is a different beast.

I'm a fan of nice laminate. It has a great deal to offer a home without deleting your entire bank account. A nice/high-end laminate will cost (about) the same as a low-mid grade vinyl ($3/sf). A high end laminate (as you know) will out perform a low or midgrade vinyl. Always.

The ONLY place vinyl 'wins' is in wet/splash areas such as bathrooms, entrances and kitchens. Everything else is the domain of laminate, etc.

If you are not sure of how much noise you are going to have to live with (once the upstairs is covered in vinyl) then go ahead and pull up the existing floor (is it carpet) and then live on the subfloor floor for 2x weeks. That will give you a VERY good idea how noisy vinyl can be.

Sorry - long story short: your CHOICE of colour is very nice. I like it. Tone-on-tone is a great way to deal with a different level. Just be aware of the limitations of the material.

Thank you so much for your detailed response! Much appreciated! I had also considered a laminate and now I’m leaning towards using that. Not quite as dark as the LVP, yet I feel it does compliment the existing. Now should the stair nose be changed to match the landing or keep it as it matches the stairs?

Keep the stairs they way they are. Stairs should match the main living space.

The question was actually regarding the stair nose at the top of the stairs. Perhaps it should be changed to match the new laminate on the landing? Or let it be as it goes with the stairs? Thanks!

SJ McCarthy: Maybe that’s what you meant - keep the stair nose the way it is?

It will depend on whether or not it 'fits' with the new laminate. And whether or not the new laminate HAS a stair nose available. If you have tone on tone, it should be much of an issue. The SIZE of the nose will need to be in line with the new laminate's thickness + underpad.

What is on the floors, upstairs, right now?

Carpet, both the downstairs and new laminate are 12mm thick. Check out the photo and usually that landing does not get much sunlight. I took this picture with the front door open at the bottom of the stairs.

Thank you for all your advice!