kenjs1,

I switched to 4451 from H4350 not because 4451 might be "better," but due to not finding H4350 for a long time while 4451 was widely available. Have a suspicion H4350 might be hard to get again if we have another component shortage. It's certainly easier to ship 4451 from Canada to the U.S. than H4350 from Australia.

So far 4451 has worked as well as H4350 in all the cartridges I've tried it in.

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