Winter Chrom inheritance/merge

I just got a 2nd Winter Chrom who is +Def -HP, which is good, but I prefer keeping my +Atk -HP one.

None of his skills are rare or unique to him other than his weapon, but I don't really have any one who would like it at the moment. I don't think merging him is worth it considering he would only be at +1 and I don't use him much as is.

Opinions?