The new TS2 features several design elements that contribute to making it significantly longer than the previous 917 D2 including an extremely thin titanium crown that’s approximately 20% thinner.
If you prefer high-end milled putters then Bettinardi and Evnroll are good bets. SeeMore which is known largely due to Zach Johnson’s success (he grabbed the Green Jacket and Claret Jug with one) offers a wide array of designs.
Featuring a blade-like clubhead with a small cavity and relatively narrow sole the Z 785 has more mass behind the sweetspot for improved versatility as well as a new Tour V.T. sole that improves turf interaction.