Pippen wrote:SoDesuNe wrote:
Go Seigen also says, the open corner is always bigger (or something along these lines) ; )
Is there a link for that?
That is not Go Seigen, that is common wisdom, for several centuries.

However, there have been players -- Kitani comes to mind --, who have sometimes played a wedge instead of an approach to the 3-4 stone in such positions. And, if the opponent's play is my play, and if the Chinese Fuseki is good, why not?
As for Go Seigen, in his "21st Century Go" writings he has not liked wedges in general.
$$Bc Large knight's approach
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[go]$$Bc Large knight's approach
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In this opening Go Seigen definitely prefers

, because White does not have a strong pincer. Even with the 7.5 komi, he likes an easy opening for Black.
As for a wedge, instead, it gives Pippen an easy game for him.

Even if it is, say, one point worse than an approach in an objective sense, he seems to be finding that it works for him, given his current opponents.
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Edit: Pippen, as for your game against hira123, looking at the position after

, it looks like he simply transposed to an opening he is familiar with.