The main reasons I see for people to choose Pro vs. Home are two-fold:
- For Remote Desktop. XP Home also has a mini-version of this with Remote Assistance, but it requires someone on the remote PC to send the invitation, initiate it then authorize taking control. Remote Desktop does not.
- For the increased security of sharing resources on a Windows domain. XP Home can function on a domain perfectly as a client, but if you wish to share/exchange your local resources with increased security/auth flexibility, Pro adds this.
One thing the chart fails to mention as well:
XP Pro has support for more types of disks/disk partition types. Home only allows for "Basic" disks, whereas Pro allows for "Dynamic" disks. This is of really no concern unless you're using higher-end, external (as in fiber) RAID arrays or higher-end SCSI-UW gear with performance or compatibility problems using "Basic" disks. As most folks use ATA or SATA drives, this is of really no concern.