In any event, they were BOTH funny and both had an impact on American cinematic comedy that lasts to the present day. Check out Lupe's amazing range in this YouTube compilation video I just ran across:
*An early incarnation of the Lupe Vélez chapter appears here. Another version appears in Myra Mendible's From Bananas to Buttocks (you've got to love that title!); the final version appears in Tex[t]-Mex. As for the chapter being "challenging", I don't really know, but my undergraduates do give me grief for it from time to time!