I've been through all the Popularity cards and this is the only one I've found where some clarification would be useful. To quote from the card text:
Discard this when you complete a block..........
i.e the card holder builds the last building to complete the block
.........that has at least one building.
superfluous text or am I missing something?
The final sentence is indeed superfluous.
You will automatically win the comparison in this block and receive 2 prestige points.
Is that 2 points for the comparison win instead of the usual 1 or something else?
It is 2 points for the comparison win.