Do they come with one key that matches both locks or with 2 different keys? Do RV10s now use the same caps as 14s? Meaning, can I use these?

Each cap ships with two keys, if you order a set they will be keyed alike. All of the RV models transitioned from the T-406 cap to the T-00007 cap in wing kits shipped since late 2017 to early 2018.