The 8 F-16CJ's (Block 52) should be pretty much identical to the USAF's birds. Singapore also operates 8 F-16A/B Block 15's. The IAF operates approximately 125 (some were lost in accidents) F-16A/B's (Block 10 and 15, I believe), which were also uniquely modified by the IAF and IAI over the years, although the differences are far from being as dramatic as with the (I)F-16D's, as the F-16C/D's had special equipment incorporated early on in their design, unlike the F-16A/B's, non of which was originally destined to the IAF. 72 (I)F-16C/D Block 30 (Delivered in 1987-1988, 48 of those are C's, and 24 are D's [Operated in a separate squadron]) were delivered to the IAF, as well as 60 F-16C/D's Block 40 (1991-1992 30 C's, 30 D's, operated in mixed squadrons).
The RSAF got the first of their own F-16C/D(J) Block 52's in 1998. They've operated the F-16A/B since 1988, including some ex-USAF (Thunderbirds) a/c that have been retired in the mid 90's. It is rumoured that they might have got the Python 4 (considered best short range AAM in the world, possible exception of the Python 5) from Israel as part of the likely sale of Israeli equipment for their F-16Ds.
Pacifism only works if EVERYBODY practices it