Any thoughts about comments about soundstaging differences between the two units?
So far I have not noticed any soundstaging/imaging differences. The first two recordings were both done on stage, so imaging is excellent on both. I just did that Big Wu show last night with the split omnis fob and haven't really listened to it much.
Can you explain "tighter" sound? Or are you leaving it up to us to decide
You'd certainly be better off hearing for yourself and making your own decision. Sound is a very difficult thing to describe in words, especially when your talking about subtile details.
The warm mod is warm. It has a noticeable mid-bass to mid-range bloom which some may find very pleasing. The low end is full and punchy - kick drums have that 'thump' you can hear and feel.
The presence mod is fast and detailed. Not as much low end, but certainly enough, and it is very well controlled. More dynamic (the difference between loud and soft seems greater) - not as mellow sounding as the warm mod, drums have a snap to them, cymball crashes are more up front, kick drums come through with plenty of impact, just not as thumping. Sounds seem to have sharper edges between them - more detail than the warm mod.
Where the warm mod shines is its silky smooth top to bottom sound, nothing really jumps out, and I don't get annoyed by harsh high end or overcoloration of the sound. I like the detail of the presence mod, but the high end definitely jumps out at me a bit. I haven't spent a long time listening to any of the presence mod recordings, so I'm not sure I wouldn't get digititus/audio fatigue keeping me from sitting through a whole set or show.