Et3rnalLegend64 said:
Of course, Ran can't be nearly as bad as Yukari (by virtue of being the Phantasm boss). Haven't reached her yet because of Ran though. Extra stage bosses have unholy amounts of health.
Actually, (and I guess this is an incredibly minor spoiler. Barely even a spoiler at all), everyone who has played and beaten both the Phantasm stage and Yukari herself say that it's easier, by nature of being what basically amounts to a remixed version of the Extra stage.
Basically, in Extra, you fight Ex-Chen as a Midboss, and Ran as the boss.
In Phantasm, you fight Ran as the Midboss, and she basically does slightly harder versions of what Chen threw at you in Extra, and Yukari does a lot of spells that are literally just Ran's spells, but a little faster and with a few extra waves/lines of bullets/lasers to dodge, plus a few new/unique and incredibly difficult cards that you have to learn on the fly.
From what I understand about skilled players, because they only have to adapt to what they've already seen, plus a little extra, they get through it easier then when they were learning Extra initially. Of course, this means that it's the same as when one goes from Easy to Normal(or Hard to Lunatic); just harder versions of what you've already seen, which does technically mean that, yes, Phantasm is harder then Extra.
I put way to much thought into this (and this is the short version. The original was around 2.5-3 times in length).