I learned today that there were three vulnerabilities reported by Google Project Zero: bounds check bypass, branch target injection and rogue cache data load. Here is the AMD response to them: https://images.idgesg.net/images/article/2018/01/amd-response-to-kernel-bug-100745803-orig.jpg
However, on Wikipedia I see that there are two vulnerabilities, Meltdown, an easy-to-exploit variant affecting Intel and Spectre, a hard-to-exploit variant affecting also AMD.
What is the relationship between these three Google Project Zero research titles and the two Wikipedia pages? Which of these research titles belong to Spectre and which belong to Meltdown?