I can't keep track of the names.
So I'll tell you the version numbers. I have a MacBook running 10.6 with dual boot option for 10.4. I need 10.4 because my favorite image stitching program (PTMac) doesn't run on anything later than that (I think. It may run on 10.5.) I also have an iMac that boots in 10.5 and now 10.8. It used to have 10.5 and 10.7 but I updated to 10.8 and like 10.8. It feels quicker.
So I'll tell you the version numbers. I have a MacBook running 10.6 with dual boot option for 10.4. I need 10.4 because my favorite image stitching program (PTMac) doesn't run on anything later than that (I think. It may run on 10.5.) I also have an iMac that boots in 10.5 and now 10.8. It used to have 10.5 and 10.7 but I updated to 10.8 and like 10.8. It feels quicker.