ERP integration (NetSuite, SAP, Tally) on each?

Both can. Different paths.

WooCommerce ERP integration: mostly via middleware (Celigo, Workato, Boomi) or app-store connectors (e.g. WP-CRM, NetSuite for WooCommerce by Folio3). Pros: connector vendor handles schema diffs and auth refreshes. Cons: middleware costs $400–$2,000/mo indefinitely; custom field mappings often require service-desk tickets; real-time sync rare (most are 5-min batches).

Magento ERP integration: direct API integration is the norm. Magento’s REST + GraphQL APIs cover orders, customers, inventory, products. Custom modules can expose ERP-specific webhooks. Pros: no middleware tax (one-time $20k–$80k dev cost), real-time sync achievable, full control over data shape. Cons: you own the integration — when SAP changes its IDoc format or NetSuite deprecates a SuiteScript, you’re fixing it.

For Indian ERPs (Tally, Zoho Books): Tally Magento connectors are mature (Cynoteck, Gateway, Adobe Marketplace listings). Tally Woo connectors exist (TallyXL, others) but tend to be batched 1–6 hour syncs. For real-time inventory + orders, Magento has the edge.

Rule of thumb: under $1M GMV with stock NetSuite / Tally → Woo + middleware is faster. Above $5M GMV with custom SAP / NetSuite workflows → Magento direct integration is more reliable and 3-year-cheaper.