Are budget canister filters like SunSun and Pondforse worth it over Fluval or Oase?

Specialist community consensus on r/Aquariums and r/PlantedTank is that SunSun is the only off-brand canister that consistently performs close to a Fluval, while newer budget brands are more hit-or-miss. The tradeoff cited is build quality, long-term reliability, and parts availability — Fluval and Oase have established support networks, while budget brands often require self-sourcing replacements.