There are differences in both the heel and toe.
Heel: There are two risers (for five climbing heights) on the Core 12 Pro versus one riser (for three positions) on the Pure 10. The Core 12 Pro risers are magnetic – a little easier to flip. The Core 12 Pro has 25 mm length adjustment where the Pure 8/10 has 20 mm. And of course the Core 12 Pro has a higher Z-value (DIN) range of 5-12 versus the 5-10 of the Pure 10 (or 3-8 of the Pure 8). All have the Elastic Response System.
If you think you may want to set the release below a DIN 5, then consider the Pure 8. The Pure 8 is identical to the Pure 10 but with a 3-8 DIN range.
Freeride spacers are only compatible with the Core 12 Pro and increase downhill performance to near alpine binding levels, at a fraction of the weight of hybrid bindings like the Shift.
Toe: The Core 12 Pro toe piece has a wider mounting plate, snow-block anti-icing system and uphill retention adjustment.The Pure 8/10 is about 50 grams lighter than the Core 12 Pro.
You have to decide whether the extra climbing heights, increased adjustment range and toe features are worth the extra weight. Personally, I prefer the Pure 8/10 despite those features of the Core 12 Pro. If you aren’t a weight weenie like me, you may prefer the Core 12 Pro.
INTEGRATED CRAMPON HOOKS ®: the included and removable crampon hooks integrate into the base of the toe piece for extreme rigidity and lightness!!
MATERIALS: Aluminum alloy, Injection-molded POM thermo-plastic, Stainless steel
I don’t think one is necessarily better than the other. If you want lighter weight, the Pure 10 is good. If you want a few more features and don’t mind the extra weight, the Core 12 Pro is good.
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Here is a recent conversation that started asking how the Hagan Off Limits compares to the Altai Hok (no comparison). In the last paragraph there is a question about sand skiing with the Hagan X-Trace Pivot binding.