Both Titan and Obscura seem priced a tad high for what they deliver (essentially a black box with a small hole in front). In the pinhole community (and it is a lively community!) there is trend for DYI cameras.
But with the Ilford pinholes you get what you pay for; the diameter of the pinholes - i.e. the f value - is both reliable (not always the case with a home made pinhole) and optimized for the focal length used. They display only little vigneting in corners (so they are not for you if you are after severely vignetted pinhole look).
Both cameras will perform well, and there might even be a marginal advantage in the more narrow aperture - longer exposure times are easier to control by hand (it is easier to measure e.g. 5 seconds than 1.7 second).
As for image quality: pinhole images do not enlarge particularly well, which is the point for shooting in 4×5".
One word of caution: with both cameras you will be in danger zone of reciprocity failure, so keep that in mind when calculating exposure.