Unfortunately, we can't say that we trust this new rumor any more than the last. The news comes from Android and Me, which claims that it was able to get its hands on the white Nexus 4 at Google I/O and that the device would come with Android 4.3. Android and Me did not mention anything about the source of the information, so we don't know if the info even comes from someone inside Google or not.
According to the report, the white Nexus 4 is exactly the same as the black version, which would mean that any rumors about the white variant having LTE support seem to be debunked. The report says the white Nexus 4 will be available in the Google Play Store on June 10th with the same $299 pricetag as the original, and that Android 4.3 would be released along to the other Nexus family devices at that same time.
source: Android and Me