Do not know... Never see or heard of either of teh two you listed in teh subject... ?
Now if ya talking EM0450 or EM0480 thats different..
Then key in EM0480 or EM0450 and down load the manual and read..
In essence same burr set. After that all marketing and ways to reduce cost from 200 to 150 or there a bouts.
As to do they work = YES (along with the usual disclaimers)