Hi Matti -
Well, strictly speaking, no.
When the bird flushed from the ground it gave the usual weakish Pin-tailed Snipe call, and showed no white trailing edge to the wing.
My only experience with Swinhoe's lies some 20 years back in time, when I spent a Spring at Beidaihe. I remember Swinhoe's as a larger Snipe (more Great Snipe-like) with a different call.
As for this bird, I couldn't say, that I gave it more thought, as it didn't sound and look any different than expected.