Sorry for the delay in getting this comparison of coral cremes up! It's my mom's birthday this week, so I've been running around trying to get good presents/delicious cake, etc.!
So I think that all of these are fairly close. The average person probably wouldn't want all of them. However, SinfulColors Timbleberry is definitely more red than the others. MAC Scorcher is more of a pinky coral and is a softer sort of hue than Timbleberry. Mod-ern Girl is the most different of these four polishes. It's much lighter and softer. It is also the least red/orange of these and has more of a dusty pink quality. OPI on Collins Ave is very orange in comparison to the rest of these. So, for me, I'm glad I own them all, as they do have their differences. There are no dead-on dupes. However, for the average polish user, MAC Scorcher and SC Timbleberry are pretty close. If you missed out on Scorcher/passed because of price, pick up Timbleberry!