OK, so daily max wind speed. Well, assuming that time, timezone settings etc are identical on both console and WLL, I can immediately think of a couple of reasons for any discrepancy:
1. The console will show the max speed it has seen fully up to date whereas there may be something of a delay before the max speed is uploaded to wl.com.
2. You may have eg different windcup settings on WLL and console. The receivers (ie console & WLL) make secondary adjustments to the wind speed received from the transmitter to allow for different cup types, different wind directions etc. If the two units are not using the same correction algorithm then the result will be a different speed.