A few more Ohm questions

There seems to be a bunch of knowledegeable Ohm types here. Since their web set ain't great, maybe you folks know:

The models are purportedly designed to sound similar - i.e., as you move up their product line, you get the same sound in a bigger room. How do the models differ? Is the same driver used in a different cabinet to alter bass response or do the different models use different drivers.

Also, if the main difference is room compatability then I'd assume that the differences from model to model focus mostly (though evidently not exclusively) on bass balance, how do the Ohm satellite/sub models differ? There is a satellite model equivalent for each full range model in the line, but all the sats are designed for use above 80 hz only. As far as bass balance goes, i would think the bass cut off would reduce the need for model differentiation that focuses on bass balance.

Do the different models become more directional in dispersion at different frequencies or at different rates to account for boundary differences that are likely to be found in different sized rooms? I suspect that speakers in small rooms are usually - though not always - closer to boundaries. Is this the basis for model differentiation?

The Micro Talls have a listed response down to 47hz. For full range operation, a sub is recommended (particularly for theater use, but optionally for music use, all per the website). How does the Micro Tall w/ a sub compare to the sat/sub combos they offer?

Following the very positive Ohm threads here has piqued my curiosity and the line certainly provides a more cost effective omni option than MBL or even Duevel. OTOH, I find the product line info on the web site awfully confusing.

These questions arose after a brief conversation with John - who was very helpful - and I'd rather see if I can get answers here before I bug him again.

Thanks in advance.

Marty