Both lineages agree on the underlying karma-trigger model + the karma-substrate-dissolution-as-aim + the gemstones-as-tier-3 placement. They disagree on what occupies Tier 1.
Two practitioner-lineages with no shared transmission-root in the last 200+ years arrive at the same theological framework (karma-trigger model + meditation-mantra-primary-over-gemstones) and then diverge precisely on the Tier-1-occupant question. This is not a theological contradiction — both agree on the metaphysics. It is a methodological disagreement about which substrate-dissolution technique runs fastest.
The disagreement is operationally consequential: a practitioner who spends 80% of their practice-time on meditation (Kurczak/Fish) and 20% on mantra-recitation vs a practitioner who spends 80% on mantra-recitation (Foss) and 20% on meditation will develop different practice-architectures and likely different operational results.
The lineage's transmission-medium determines its Tier-1 occupant. Kurczak/Fish are downstream of Kriya Yoga where pranayama-meditation is the primary transmission and mantras are an adjunct. Foss is downstream of Sanjay-Rath-direct where the 108-mantra apparatus IS the primary transmission. The Tier-1 emphasis is a fossilization of what the lineage's transmission-medium foregrounds, not an objective ranking of effectiveness.
If correct, the choice between hierarchies is not a question of which is right but of which the practitioner has affinity-with-transmission for. A practitioner with strong meditation-affinity should pick Kurczak/Fish. A practitioner with strong sustained-recitation-affinity (Mercury-strong natives, per Foss's framework) should pick Foss.
For promotion to ARCHIVES:
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The dedicated cross-lineage comparison page Foss's Mantra-Primary Remedy Hierarchy vs Other Vault Lineages documents the disagreement at full operational depth. This collision stub records the structural-position; the page works the operational-detail.