I wouldn't ditch both sanchezi's. You'll have a tough time keeping them both together (but not impossible). I'd hold on to the one that is most promising and bring back the other. Unless you plan on keeping them in seperate tanks... I've always ended up getting rid of one juvi serra if I had another the same size and same species. I've only kept three for any real length of time, but have bought a few more.
Sanchezi's kick ass.
Sanchezi's kick ass.