Oh you both have great voices!!
Lara - I like the intonation in your voice, it makes it fun to listen to

(though it may be just a little over the top sometimes) and btw; I don't think you have a low voice or something..
Sara - Nice, steady voice & accent

I'd speak a little slower if I were you, though. That's only a suggestion of course, it already sounds very good (both of you!

)