Differences

Androphilic and gynephilic transsexual typologies used to be far more distinct. For one thing, gynephilics were waiting much longer to transition because they were swimming against the current in a society that saw them as aberrations far worse than today. Androphilics, aligned in sexual orientation and more obviously feminine in childhood, at least were aligned with the current instead of against it.

Today it's not as obvious which is why Blanchard's model has aged so poorly (never mind that there are now transgender men which is yet another wrinkle). Gynephilics are not only transitioning earlier but when we consider Kinsey and his scale it's no longer easy to even assume orientation as some people change post transition.

That Blanchard disciples are still stuck in the 1980's it's because the current landscape doesn't do their pseudoscience any favors and weakens their credibility, already leaning well into fringe territory, even further.