[alasarmas]

Steel bikes feel “better” and “springier” than aluminum bikes. Objectively, they last longer than aluminum bikes.

What exact differences in physical properties or construction leads to this, I couldn’t tell you, but you can pick up an old steel bike frame for cheap and experience it yourself. Well-made steel frames are much lighter than poorly-made ones, so I would recommend finding one of the good ones.

[Mawr]

So long as that "feel" is just that, there's nothing to talk about.

Unless of course you tried two of the exact same bike with the only difference being the frame material, in a blind test. Then we could talk.

But most likely, you tried two completely different bikes, felt some difference and arbitrarily decided it must be the frame material.

[alasarmas]

No, I tried probably ten or fifteen of each type over a 35 year period.

There are a bunch of factors, including tube thickness, alloy (I’m sure that when it comes to steel this matters, I think it doesn’t matter with aluminum), and frame geometry.

One thing I can say with absolute certainty is that, if you are using rim brakes, aluminum wheels are so much better than steel wheels it’s not even a conversation worth having. This is because aluminum wheels, unless they are painted, will have a nice aluminum oxide coating. This is effectively a ceramic and the coefficient of friction with rubber brake pads doesn’t change when the rims are wet, say on a rainy day. Steel rims lose all friction when wet.

Because I have been around for a while and made a lot of “experiments” (mistakes), I know some things. I’m happy to share what I know with you.