I don't think this is an urban legend.
It is based on numerous doctors' experience and on a few published papers as well. Dismissing all of them as being wrong is quite bold.
E.g. this one:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5654325/This particular one does not (if I remember right) necessarily confirm that the Titan is harder to the touch, but it does confirm that at the same pressure inflated, the LGX does kink easier.
And in reality, this is what we look for. The implant to be able to withstand kinking or bending when forced to withstand longitudinal column load. Hard, as in an unnatural feel like glass or steel, is just a negative side effect of achieving rigidity.
The column strength is needed when penetrating or when e.g. the woman is on top riding aggressively and going up just a bit too high and then coming down again at a less than perfect angle.
I don't think we should just disregard several famous doctors' judgement (among them both Eid and Kramer) saying the Titan is more rigid when inflated, neither should we ignore studies like the one I linked to.
What we instead should consider is - does it matter? If we have two brands out there, even two great brands, of course all parameters won't be exactly the same for both of them. But just because one is harder when inflated, another one might be softer when deflated, one of them will have a smaller pump, has a more palpable pump, is thicker, is thinner, feels more or less natural when deflated etc - doesn't mean that one is great and one sucks.
They score higher on different parameters and even at any given parameter, just because one scores higher doesn't automatically make the other one poor in that area.
Because as someone said here, we don't really see many people here on FT complaining that their LGX dicks are too soft. On the contrary, most say their dicks are super hard and harder than their natural erections. In that case, even if the Titan evidently is even harder, so what?
I am however sure that I have read some guys on here who've had both and confirm the Titan is harder. And some others having had both say the difference is negligeable.
So I'd say the Titan is "harder", at least as defined by being able to withstand longitudinal column load, but that's just one parameter of an implant. And for an most people posting on this site, the LGX is definitely hard enough, even potentially harder than wanted.
My personal preference, and my wife's, is pump my Titan to the maximum, or very close to it. So in my case, the LGX being evidently slightly less hard, it would not be for me/us. But someone who does not even pump to the max on an LGX - then of course this is not an issue. Luckily we're all different with different preferences.