IVI_VAL_MULTI_CHANNEL vs "Repeated" checkbox

[gggggl]

I'm creating an IviScope driver for our PXI digitizers in LabWindows/CVI.

When editing specific driver attributes, i see this form:

For an attribute that has a separate value for each channel, I can check the "Repeated" checkbox and specify "Channel" as Repeated Capability, but I can also set the "IVI_VAL_MULTI_CHANNEL" flag.

What's the difference between them?