Just wanted to chime in here:
the short answer is that MaxX is anarch's Andy: her ability is flatly powerful and in almost every case outstrips any other in-faction ID. On top of that whizzard is competing with strong second-bests in Valencia and Reina (not counting noise here, as obviously he is the 4th runner faction).
That said, as a long time (mostly before O&C) whizzard player, the old gripe "he is a blank ID vs..." is a pretty tired argument that I've never found holds up. whizzard is pretty much guaranteed to do work against the top 3 corp factions, and even against Weyland you have EBCs, adonis, ash, and crisium grid all over the place.
So, yeah. MaxX is flat better. Val is better in probably 70-90% of situations (though the 5-card difference does matter). Reina is better in the headlock niche where she lives. All that said, if you know your crew is packing those HBFA or NEH decks with mountains of assets and upgrade, go for it, whizzard'll pull his weight.