I had the Blackspire Crusher on my bike before (now sitting in a spare parts box) and while it worked well overall, the chainring range leaves a bit to be desired. I run a 32T oval, which is similar to a 34T at the widest point, so their 26-32T option wouldn’t protect the chain/chainring, so I went with the 32-38T option. That protected the chain/chainring, but hung down way too low and was always getting hung up on stuff. I ended up running it without the plastic bashguard and used the aluminum mounting plate as the bashguard. It worked, but not ideal.
The OneUp equivalent comes with multiple size bash plates so you can run the small one that will give you full protection of your chain/chainring, while also giving you the most ground clearance possible. Depending on the chainring size you run, it may or may not be an issue, but certainly worth noting.