Lesser/greater Rituals, What are the diffrent uses Options

Ok i've seen it asked many times but have yet to see a answer to the question.

What is the practical diffrence between the greater/supreme and lesser rituals? eg.lbrp and gbrp
I know the greaters uses the spirit pent/hex.This is not really what i'm looking for.
they have diffrent uses what are these uses?

From my own studies its looking like the lessers are use to invoke/banish a single element or planetary force were
the greater ones are for invoking/banishing more then one element or planetary force at a time.

Am I looking at this right?

I'm sure there's more to it but i really don't need a indepth study of it just something to get a idea on the system of magic.

thanks in advance just having these fourms to read has answered alot of questions i've had.

I'm by far no expert but as i see it the lesser ones are used to invoke for example air of air in all quarters, whereas the greater ones invoke each element of air in each quarter if you follow? (If we use elements as an example)

So in LIRP you would invoke air in east south west and north, but in GIRP you would invoke air in only one quarter, and earth in another and so on and so forth, the point being you invoke air of air, and air of earth and so on and so forth...

I don't know how informative this was or even if it's similar to your question, but hey, here goes nothing. (IMG:style_emoticons/default/confused012.gif)