I really like how Ulti changes into hybrid form, and Page One is in his full Zoan form;
very representative of how Zoans like to use their power.
Zoans like switching forms in their fights to adapt or gain leverage.
So in this case where there're two, Ulti's in smaller leaner but way more agile hybrid form,
and Page One in the Full Zoan form to apply weight or overwhelming size if needed.
Like having a Tankman and Snakeman duo team (don't mean power wise).
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They can switch forms pretty damn quick too...so it makes sense Ulti was
able to pin down a distracted Luffy in her Zoan form,
she probably blitzed and changed at the last moments.
A Px-9 right up on Drake when he changes in time to stop Kuma's fist.
Lucci changing in mid air:
Chopper does that a lot too where he changes to a small size to get out of a restrain,
or he goes to his jump point or Heavy point to adapt., though he needs to do this more, recently.