sorry...moving it over to the flooring forum.

I have 2 differenct stains upstairs and downstairs. Bought a 100+ yo house 5 years ago. Redid the floors downstairs right away. Upstairs are the original floors / color. I cant say I love it. IMO its better than having carpet but would look best all the same color. Its sorta has the same feel as having a different color carpet in every room...not my cup of tea.

That hardwood looks to be red oak with either oil based finish that has oranged (ambered) over time or a light stain. The SPECIES of the hardwood is pretty easy to match. If you are going to add more hardwood, then the SPECIES match is the most important thing. You can always work with a different COLOUR on the upper floors. That is completely acceptable. And as Sina points out, you can always do the hallways/master bedroom in the hardwood and then run carpet (durable as you can find) in the other areas. Again this is perfectly acceptable. Many, many people prefer carpet in bedrooms and offices. Because the hardwood looks to be red oak in a 2" - 3" wide plank, this should be super easy and (relatively) cost effective to find/install. You can save money by adding carpets to the other areas. Red Oak can then be added to other rooms at a later date if you feel you want a house that is wall to wall hardwood. It is one of the easier species to find/install/match. They key to this is the species match.

The flooring on the upper floor (aka bedrooms) can be different from the flooring in the main/public areas. I would pick a colour that is present in the Hickory wood sitting on your main floor and see if I could find a laminate that falls into that colour story. This will add continuity without competition (as little bug and Sina point out). Now the two issues you are about to face: the STAIRS (dun dun DUUUUUUN!!!) and the NOISE. Sigh. Carpets get rid of a tremendous amount of noise. Carpet keeps noise from escaping OUT of a bedroom as well as prevent it from ENTERING a bedroom. Here's what I suggest. Go ahead and rip out the carpet in the upstairs and then LIVE with noise/echo of the subfloor for a week. At that point you will either feel you have an INCREDIBLY well built house (unlikely but always a possibility) OR you will discover how LOUD everything/everybody really is (99% chance of this happening). And that's where you will start your 'carpet replacement' discussion. I have always said a cork floating floor (installed just like laminate) is a great carpet replacement. It is warm, soft and quiet. It deals with 80%-90% of the noise that carpet deals with. It is a 'like for like' replacement for carpet. Laminate is not. Laminate is a hard, rigid surface just like your subfloor (that you found to be quite loud). An acoustic underlayment can be used (QuietWalk Pro or 6mm cork underlay will do the trick) to keep noise transfer from "up down" noise. But it won't help with noise exiting the bedrooms, moving down the hallway and entering another bedroom. Only cork and carpet prevent that. Once you have chosen you material and the underlay thickness you can then tackle the stairs. This gets HORRIBLY tricky. I'm assuming the carpet is on the stairs as well? Right, now we have to keep the stairs to code so that the height of the rise is EQUAL all the way to the TOP FLOOR! That means you have to adapt all the tread/risers to match the FINAL height of the floor+underlayment. Zoinks. And I haven't even TOUCHED on the floor leveling needed once the carpet is removed. Carpets hide the WORST subfloors in the world. These subfloors are thin, wavy, pitched and are of low-grade materials (often fibre board sits on top...which does NOT like patching material). To get a rigid floor (floating or otherwise) you will need to level that subfloor. That's going to eat up $2-$4 per square foot ($2/sf is quite common...$4/sf is not likely but it has happened in REALLY sh!tty builds). And now that the subfloor has been leveled, you have to reassess the stairs. Or you can replace carpet with carpet. This may not be ideal if there are allergy suffers or asthmatics in the house...but it is always an option when replacing existing carpet.