I've heard the Genz and really like it. Haven't heard this particular Aggie, but I like the tone of other products they have. I know the Genz has both a tube and SS pre, but I've read a lot of posts that say this Aggie is really warm for a SS. Looking for the one that has the most volume and girth/robustness/punchiness to its sound while still maintaining super clarity and other tonal shaping capabilities. I'm sure there are other differences to consider - would like as much additional comments and feedback on your vote as well. Thanks everyone.