A depressurisation PET would typically be at a different location than the all-engine PET because:

it uses the same speeds

it is always at the midpoint

depressurisation has no effect on routing

the aircraft would descend to FL100 and fly at a different (lower) speed, changing groundspeeds

Correct

Explanation

After depressurisation the aircraft descends to a lower altitude with different TAS and groundspeed, changing the PET location.

Test yourself with random questions from Flight Planning and all other ATPL subjects.