The Keycool 84 and Noppoo Choc Mini are 75% boards, the Poker II and others of its size are 60%.
The 75% boards are hard to find replacement keycaps for, if you ever want to do that, with the Noppoo Choc Mini being almost impossible due to the non-standard spacebar size, but it does come with good keycaps by default.
Of the 60% size boards, the Poker II is very popular and for good reason. The non-backlit version comes with good caps, can have backlight LED's added if needed. It has a decent Fn layer and can be programmed. Standard keycap layout so it's easy to replace them, fits almost all aftermarket 60% cases, etc.
IMHO, the Ducky Mini will be a decent quality board, but the case is large and goes against the philosophy of having a 60% sized board.