ACT to SAT and college admissions

<p>Hi,
I have seen a few sites that compare the ACT english to SAT CR and ACT Math to SAT math and when i look at my conversion scores that way, my ACT scores to SAT CR/M has a higher number vs. the scores on charts that convert the composite score on ACT to SAT CR/M. Does anyone know what the universities actually look at when someone sends in ACT scores? My ACT English and Math is almost 100 points more as an SAT conversion than the Composite score conversion. I don't understand why there are "official" conversion charts for just English or Math but also Composite to SAT Cr/M. Thanks!</p>