***********************WARNING, ATTEMPT TO PLEASE ALL. LOOK AWAY!***********************
Both sides are correct in my humble opinion. The
term "advantage" can be applied to both explanations.
Scenario: Both opponents ( A, B ) have 100hp
A has the flag
A hp = 115
B hp = 100
A has an HP advantage of 15%
B has the flag
A hp = 100
B hp = 115
B has an HP advantage of 15%
This is one way of looking at an advantage, and it is correct.
The 15% number is correct only if both teams have the exact same stats,
and will fluctuate wildly in a real game. (It might not even be an advantage,
just a lesser disadvantage to hold the flag if other team has much better stats)
The other way to look at it is also correct. Let´s add dps
into the game, say 100dps equally on both sides.
Let´s also assume that enemies meet one on one until one die,
then the next enemy rushes in. (for simplicity)
A has the flag
A can kill first enemy and have 15hp left.
A can hurt second enemy down to 85hp before dying.
A did a total of 115hp damage and killed 115/100 = 1.15 enemies while holding the flag
B has the flag
A can deal a total of 100 damage to first enemy before dying.
A did a total of 100 damage and killed 100/115 = 0.87 enemies while NOT holding the flag
Now it should be simple enough to see that your advantage over the other team is about
1.15 / 0.87 = 1.32 => 32%
The 32% number is highly dependent on both teams having exactly the same stats, the
actual advantage will wary wildly in a real game. (It might not even be an advantage, just
a lesser disadvantage to hold the flag if other team has much better stats)
Both definitions are, in my honest opinion, acceptable. A group which talks about an
"advantage" just needs to agree on how they define the word.