TMR sticks and platform breadth cost more.
Hall effect vs TMR is a generational gap, not a defect
Both technologies exist specifically to resist stick drift, the failure mode that ends most older controllers. TMR is the newer of the two and GameSir markets the Cyclone 2 around it; that doesn't make the 8BitDo's Hall effect sticks unreliable, just a step behind on paper for players chasing the newest sensing tech.
One controller is built for Nintendo's button labels; the other isn't tied to one platform
The Ultimate 2C's face buttons and app support are built around Switch conventions first. The Cyclone 2's GameSir Connect software and Xbox-style layout are built to feel native across PC, Steam, mobile, and Switch equally, which matters if you're not staying in one ecosystem.
Polling rate only matters if you're playing where it's measurable
1000Hz polling shows up in fast PC shooters and rhythm games, not in Switch's own software, which doesn't expose that level of precision either way. If your platform is Switch and your games are the ones in the OSRS setup hub's orbit rather than competitive PC shooters, this spec matters far less than price.