You probably already know this, but in some sense there are two types of RAIDs: software RAIDs and hardware RAIDs. Software RAIDs use the operating system to perform the behind the curtain RAID operations, while hardware RAIDs use a hardware controller to perform these tasks.
If you're setting up a hardware RAID, then addition to your hard drives, you have a RAID controller. How many hard drives are you using? What kind of RAID controller are you using?
If you don't have a controller, then you are looking at a software RAID. If so, the different distributions won't perform that differently, because kernel-level operations will dominate.
Hardware RAIDs are easy as pie; Linux doesn't know the difference. It looks like one big SCSI device to the operating system. Software RAIDs require some manipulation and maintenance. Sometimes very little; other times more.