The Omni is more versatile - higher output and more even coverage without sock, very even face evenness with sock. And, of course, better wind stability - particularly VS 51" PLM.

Disadvantage - smaller source size.

There's probably not a huge difference if you are relative far from the subject. Of course, the Omni without diffuser excels if you need to light from considerable distances.

Without the diffuser, Omni is similar, but more even -both are fairly narrow angle.

If too narrow for s full body at a given distance, put the sock on and move it it close. That gives you the option of high specularity or low.

Some shooters want very low contrast and specularity, others want more pop.

Correct.

I've had my Omni for a couple of days and I think it will be rather versatile.

I also drilled a hole in it to fit the elinchrom deflectors and I like the silver beauty dish type look it gives me with a sock over it and a white deflector.