- Eternity Pi

First Impressions
The 900Global Eternity Pi (released September 2023) positions itself as a high-performance option for heavy oil within the 900 series. Visually, the ball comes in a striking Burgundy/White/Black color combination with a dull 2000-grit Abralon factory finish, which immediately points to its purpose on tacky lanes. Technically, the Eternity Pi marks an evolution: it combines the proven Epoch Asymmetric Core (RG 2.49, diff 0.050, int. diff 0.014 at 15 lbs) with the newly developed Reserve Blend 901 Solid Reactive coverstock. This cover was designed specifically to run a touch cleaner through the heads than the S84 Response cover of the "Reality" without giving up traction in oil. The core's moderate intermediate differential should keep the ball from "locking up" (burning up) too quickly, which is often an issue with very strong asymmetric cores. With that, 900Global is targeting a gap between extremely early "snow tire" balls and faster pearl versions.
Comparison
Compared directly to the original 900Global Eternity (pearl surface), the Pi gets going noticeably earlier on the lane and offers a rounder, more controlled overall motion, which is what higher oil volume requires. The most important distinction, however, is against the 900Global Reality: while the Reality is known for its extremely early start and a very smooth motion, the Eternity Pi generates a bit more length through the Epoch core and the 901 cover and retains more energy for entry into the pocket. It feels "livelier" at the breakpoint than a Roto Grip Gem, which tends to grab even earlier and respond more slowly. Against the later-released 900Global Harsh Reality (Reserve Blend 902 cover), the Pi is a small step weaker and cleaner, which makes it more versatile as soon as the lane shows the first signs of transition, whereas the Harsh Reality is built purely for maximum oil volume.
On the Lanes
The ideal scenario for the Eternity Pi is fresh conditions with high oil volume or longer patterns. The coarse 2000 surface generates the friction needed in the midlane to get the hook started reliably. If you throw the ball fast, it's an excellent tool for creating traction without having to adjust your delivery. Rev-dominant players benefit from the control: the ball doesn't tend to turn over-reactively the moment it touches the first dry boards, but instead offers a readable arc. Once the heads open up and oil gets pushed down into the backend (carrydown), the continuous nature of the core allows you to keep moving left and open up the angle without the ball losing carry. It therefore often serves as the first ball out of the bag at the start of a tournament.