Not exactly. Sailfins have more rays in their dorsal fin.
From Planet Catfish
"Pterygoplichthys can be identified by the number of rays in the dorsal fin. More than 10 indicates that it's a Pterygoplichthys. Most other plecos have 8 or fewer rays (in particular the larger Hypostomus species that are most likely to be confused with Pterygoplichthys). "
Pterygoplichthys gibbiceps is The Sailfin Pleco.
Several lookalike large Hypostomus sp are called "Common Pleco".
Gibbiceps are distinctive once you know what to look for. Notice the tail is deeply scalloped and has top and bottom points.
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