Go for the ones from Hillsound they're much better than the Katoola type. some of the meetup hiking groups get a discount there, so may be worthwhile joining. warranty for 2 years, so keep the receipt.
What do you find better about them?
Their "Trail Crampon Ultra" is an almost exact knockoff, and seems good, though the Kahtoolas appear to wear a little better to me.
Their "Trail Crampon" has the plates instead of chains, which might be preferred by some people for certain uses. I've found that they don't tend to hold on your shoe as nicely as the chain ones (comparing Hillsound and another plate-style with hillsound and kahtoola chain-style).