Leveling speed aside, ToAs are the only Tattoos other than Hals (who can't have lesser version) that have an ability based on their NW.
Lesser Tattoos have less NW than an equal sized full Tattoo, don't they? If they do, this would mean that a LToA of the same size as a full ToA would provide the same STR and DEX, but less PTH.
Shouldn't they provide the same PTH?