Hi Nacho,
Pretty obviously the 122 is going to have an early planing edge over the 111.
How much depends upon a few variables outside our control (like rider style/technique/weight plus water condition etc), but the 122 could be generally rated to lower the "average" planing range with 7.5m by 1-2 kts - which might not sound like a lot, but in marginal planing can be the whole game.
Cheers ~ Ian
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