Octatrack vs Ableton Live quick help

[Sergio G <simpliflying@gmail.com>]

Dear delighters,

waiting for your feedback on my first music experiments, I have a question to offer to you, for a quick help.

I will very probably buy a copy of Ableton Live Suite.

And I have found an Octatrack for a reasonable price, still quite higher than what I could and should actually spend now.

And I need to give an answer soon, especially for the Octa.

I wonder if with the Ableton Live and some launchpad and/or midi pedal/controller I can be more than ok for live performances, or if an hardware looper can be needed and so in that case if the Octa would be the right answer.

In these days I did more experiments with the Boomerang, alone and jamming with friends, and I am very sure that it does not fit my needs.

I do different things. In this moment I mostly tend to do techno beatbox, but I also do more funny stuff, and I like experimental/ambient things.

I need to be able to create and tweak loops very fast, do variations, breaks, etc. 

Can I with Ableton and some controller create a loop quickly, real time, and then overdub, undo, redo, create other loops, stop, restart, pause, restart, mute, time strech, pitch shift, effect, etc, with just ableton, quickly, on stage, no dead times?

And with Octa?

Is the Octa worthed if I will have Ableton?

Or could I eventually better complement the Ableton with a Echoplex for example?

Thanks a lot!