But what we do know is that they both Top 8'd and Daryl took the whole tournament down.
Magic players are the first group of people to jump down your throat if you try to say that something is strictly better than another thing, and Kird Ape is not without its advantages. Always being a 2/3 is not for nothing, but it comes at the cost of both haste and the potential to hit much harder.
The big upside of Kird Ape is strategic coherence with counterspells that Monastery Swiftspear lacks. Many Delver players have moved away from Spell Pierce in order to function more like a burn deck--a strategy that heavily increases Swiftspear's stock.
This, of course, has led to a rise in popularity of Storm and other such combo decks, which makes it unsurprising to see the Delver players with Spell Pierce seeing the most success. Betesh plays fewer Pierces in his list, but his Stifles present the same tension with Swiftspear.
Another downside that's easy to overlook is that Kird Ape pushes you towards playing Taiga in your Daze deck. To be fair, you can probably get by without the Taiga, but it's worth pointing out that it was always bad in older Temur Delver decks.
If Spell Pierce is the big draw to Kird Ape, then I have to wonder if Kird Ape is actually better than Swiftspear. Personally I've been fine playing Pierce in my Swiftspear build, but there might be something to this deck's success.
Chime in in the comments on the Kird Ape vs Swiftspear debate! Can you make a monkey out of me?