I have both cartridges and I switch these two often because I use SME3009 tonearm with removable headshell so that I can switch them easily, I wish I have two tonearm system so that I don't need to replace them that often.
It really depends on what kind of music you are listening. For me, when I listen to pop music like Eagle's hotel California, the maestro is better in a way that it provides full of power especially the bass is tight and clear, the lyra is more define but I cannot feel the punch like Clearaudio gives to me.
In terms of classical music, no matter orchestra or solo with piano or violin, Lyra is noticeable better. The staging is good, the level is clear, the music is detail but also musical. I feel clearaudio for those type of music cannot touch me more than Lyra.
In summary, If you like Pop or Jazz, go for Clearaudio, if you like classical and instrument, go for Lyra. If you have two tonearm turnable, use both.
For MM cartridge, I have tried several but I like Clearaudio the best. I also like Shure type III very much but it is more of a nostalgia reason, especially use it to listen to Don Mclean's Vicent...
For MC, I also tried a lot, from price/performance point of view, I like Delos the best. Just my two cents.