Neither of those Epox boards have USB 2.0 afaik...The 8kha+ does have 1 more PCI slot. The 8kha+ also uses a mostly jumperless design whereas the 8khal uses mainly jumpers for settings things like the cpu multiplier. Also the 8khal does not have a chipset fan on the northbridge...I'm not sure what the other differences are.
There are a few reviews out there of the 8khal though...
Gaidin
Edit: There are no diagnostic LED code screens on the 8khal and the floppy port got moved.
Go read
this reivew. They do a good job of showing you the differences between the two boards (esp. in that larger heatsinks may not fit on the 8khal).