The μMAX package complies with JEDEC MO-187 for Plastic Low/Thin/Very Thin Shrink Small Outline Package, 0.65 AND 0.50 Pitch.
Provided the variation type is the same, there should be no issue with using a μMAX package in place of a μSOP package. (ex. "JEDEC MO-187 Variation AA/JEDEC MO-187-AA"). The variation type will be stated on the package drawing for the device.