Jessel et al. ("Behavior Analysis & Practice," 13(1), 205-216, 2020a) conducted a review of the functional analysis literature between the years 1965 and 2016. The authors found an increasing trend in analyses replicating the components of Iwata et al. ("Journal of Applied Behavior Analysis," 27, 197-209, 1982/1994a) and determined that those components have come to represent a standard format. Since the inception of the standard, other functional analysis formats (e.g., brief, latency-based, trial-based) have been developed to improve analysis efficiency and control, with most retaining fundamental components of the standard and some omitting all (e.g., interview-informed, synthesized contingency analysis; IISCA). We conducted a review of functional analyses in this two-part evaluation to determine the levels of efficiency and control afforded by functional analysis variations and formats.