Mechanical differences between PU vs Remember:
1) PU is an instant spell, Remember has a 1 turn delay with the delay a chance of interruption. [PU is better]
2) PU allows both creatures to keep Activated or Innate (automatic active) abilities. Remember removes Activated or Innate (automatic active) abilities. [PU is slightly better]
Metagame consideration:
These two differences show PU to be a better card for ETG than Remember. This begs the question about whether the game would benefit from an additional card in the PU, Fractal, Mitosis set.
Balance:
PU is worth 8q (7
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+1card).
Remember is worth 8q -X (1 turn delay) -Y (Lobotomizing)
A Lobo spell (spells that lobotomize) is worth ~4q minimum. (the value of a theoretical Lobotomy Spell derived from Lobotomizer's skill)
I would estimate X+Y=2q.
Remember is thus worth 8q-2q=6q=5
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+1card
Suggested cost: 5
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+1card|3
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+1card