Your anecdote is exactly the same as all others claiming to be able to tell the difference - there's not enough information in it for anyone to be able to make a judgement either way.
I would expect that a person conscientious enough to know how shocks, wheel size, tyre type and pressure, saddle type, and speed affect ride comfort would also include that information in their post.
Therefore, these anecdotes amount to "I rode on two different bikes which happened to have different frame materials and I could tell a difference in the amount of vibration." Meaningless, even if we don't consider human biases, after all these aren't blind tests.
I would be curious to know if there is a difference that can be felt, but in the end it's of no practical use. I bet even slightly adjusting your tyre pressure will have 10x the impact of any possible difference in frame material.
My basic argument is just that it is plausible that the perceived different feel of different frame materials is real, and that there is no support for the claim of another comment that a different feel is impossible. I am surprised that no one seems to have done any convincing experiments.
I could have left out my anecdote because it is subjective and prone to bias and error, but it is how I believe I can rule out (some of) the commonly cited reasons of different bike feel -- seat posts, because that would not affect vibrations coming through the feet; and tire pressure, because different tire types and pressure have their own different and recognizable feel (e.g. responsive and jittery with high pressure, squishy and sluggish but not silky smooth with low pressure).
I would expect that a person conscientious enough to know how shocks, wheel size, tyre type and pressure, saddle type, and speed affect ride comfort would also include that information in their post.
Therefore, these anecdotes amount to "I rode on two different bikes which happened to have different frame materials and I could tell a difference in the amount of vibration." Meaningless, even if we don't consider human biases, after all these aren't blind tests.
I would be curious to know if there is a difference that can be felt, but in the end it's of no practical use. I bet even slightly adjusting your tyre pressure will have 10x the impact of any possible difference in frame material.