Looked through my bird guides. The large National Geographic shows a tip only on the Pewee. Also says that it is distinguishable from the Flycatchers by having longer primary projections. The Flycatchers' primaries barely reach beyond the base of the tail. Sibley's says nothing about beak tips. The Smithsonian Field Guide, which uses photos, shows both birds with beak tips, though doesn't mention it in the descriptions.