Cubase (se) Vs Logic (ezpress)?, Beginner Sequencer software advice? Options

[landlox]

Hi -
I'm experienced with Mac's but not music software.
I'm interested in learning by starting with a program to mix maybe a few midi and a few audio tracks.

I've seen Logic Express for $140 student price and Cubase SE at Sam Ash for $100

Are there any real differences between these 2 products as far as what they DO?? Is it just a matter of differring special effects? (I'm most interested in pitch shifting audio due to my limitations of various kinds - ha)

I get the idea that these programs are basically what used to be called 'sequencer programs' (a term that seems extinct for some reason - i had dabbled in Metro 4 a LITTLE years ago)

I have a B&W Powermac with a G4/500 upgrade chip. And a Casio consumer MIDI keyboard and a USB interface i got a while back, in case thats a concideration for the software.

In short - assuming my machine can run them (which I think it can) what do these programs (or their big brothers) actually do that are different from each other - interfaces etc aside.
Thanks
Landlox