Considering that a single coat of stain is all that is recommended, the look that you have right now is what you will end up with. I recommend you stop and reconsider what you want to do.

To get this "right" you will need to sand off the stain (on the new hardwood) and start over with "test patches". Just like a hardwood flooring professional would do for you. The thing you will remember is that OLD wood is very DENSE. When it was grown, it was denser as trees were much older when they were cut down (then they are today). And they have more than 80 years of "drying out". As they dry out, these old floors can become denser still. And dense wood takes stain in a vastly different way than new wood. And then there is the cut...etc.

Right now you will need to treat your two wood floors as if they were completely different. To get them to match, you will need to do all your experiments before you finalize the stain/finish coat.

The other thing you will want to do is apply a SINGLE coat of finish over top of your stain patches. This allows the full depth of colour to show through. And if you used an oil based polyurethane on your original floors, please realize it ambers with age. Some of these oil based polyurethanes become a strong orange colour simply with time. Add that to a cherry stain and you can have a rich toned floor just like your original hardwood.

Before you add more stain or before you sand it down again, I would simply put a coat of finish over a 2ft x 2ft patch (in the same spot as your photo) and see what will be the FINAL colour. Just to be sure.

Tins or pints of stain need to be purchased and then mixed/attempted on site. You will "open" each tin and dip a piece of left over flooring into each one. You will then wait for it to dry. Then apply a single coat of finish over each one.

Once you have the look of each one as a PURE colour...you will use your "eye" to do some mixes. Start out with 50:50's...then move on to 25:75 for darker/lighter. You will keep a COMPLETE record of what you have done to each test strip. Once you get close to the colour, you will then apply a single coat of finish to ensure you are seeing what you think you see.

Once you are 99% sure, you then make the mix again and apply a 2ft x 2ft patch on your floor (again, as close to the original hardwood as possible) and a coat of finish. If it is a nice match, you then make up BIG batches of the right mixture and start the project again.

This is going to create extra costs up front, but it will pay off. Special blends are not easy but they can work in a situation like yours.

For a custom stain your finishers should be able to make some samples for you to look at. If you are looking at them in person versus just imagining a match it may make it easier to spend the $$ to get the match instead of just getting close. I hope that makes sense :-)

Your old floors are so beautiful (I also have a 1935 house with original hardwoods in some of the rooms). Kudos for restoring them so beautifully.

Ditto what SJ McCarthy said. But I wouldn't dip, because it's going to be heavier coverage than brushed/wiped on. I actually do my mixing in separate disposable cups then brush or wipe it on. You have to keep track of what's what. When I do this I'm onlying working with 2 different stains or a stain and clear if I want a hint of stain.

Your original flooring looks more like white oak. That would be part of your staining problem. You would need to apply a pink blocker to the new red oak, prior to your stain application.

Try water popping along with a darker stain first. The other, alternative is to apply a coat of aniline dye and overlay it with a stain. This method can be a more difficult task if, you have never applied aniline dye to a large area.

Are you sure the wood is the same in both floors?

Everyone keep in mind the homeowner is the finisher I believe. Yes it does look like two types of Oak to me too.

EI G, not clear poly. There's a clear "stain." It's a tint base.

Looks great. I love the wipe on finishes. Best wishes for the rest of your remodel.

Please make sure to share pictures when the project is all completed. I'm sure someone will have a similar conundrum in the future. :-)

Thank you for sharing photos!

Fabulous! Thanks so much for posting the finish. You should be very proud of your DIY-self. Happy Houzzing!

Very well done! Thanks for coming back and posting the update.