Ash or maple
The MT27 comes in both. Ash is lighter and more flexible with a visible grain, and it is the traditional choice for a hitter who wants some give; it is also the cheaper of the two. Maple is harder and denser, holds up better to mis-hits off the end and in on the hands, and is what most pros swing today. If you are buying a wood bat for the first time and hit a lot of BP with it, take the maple.
The KG1Y is the youth pick: a 2 1/4" maple barrel and a flared knob in a 31" length, for wood-bat leagues, BP and any young player who wants the feel and sound of real maple.
Frequently asked questions
Is the MT27 really the Mike Trout bat? It is the Custom Pro version of his model from Old Hickory, the same turning they supply to him.
Is a wood bat legal in my league? Wood is legal almost everywhere, including leagues that require BBCOR or USA stamps, but check your rulebook; some youth leagues require a specific barrel diameter.
How should I break in a wood bat? You do not. Hit with the label facing up or down so contact lands on the edge grain, and it will last as long as any wood bat can.
Is there a warranty? Wood bats can break on any swing and are not warrantied against breakage by any maker.