"greater" here means that we would think that SHA-2 is easier to break than SHA-3. Technically speaking, it's a guess, but I think that the general consensus is

"greater" here means that we would think that SHA-2 is easier to break than SHA-3. Technically speaking, it's a guess, but I think that the general consensus is that it is more likely that SHA-2 will be broken before SHA-3.