Hello,
the coin of capnbirdseye is from Japan.
Nagasaki Trade Coin; Gen Ho Tsu Ho
cast from 1659 - 1667
Unfortunately, I own no Chinese piece. Weepio has properly explained the difference.
There are 2 main variations and countless modifications of it.
The main kinds are: 1-Dot Tsu and 2-Dot Tsu


The differentiation to the chinese coin:
chinese:

japanese:

Obvious Remmelts makes here a small mistake. Possibly he lacked literature for the search which is available Today.
pingu