what can logic do for me that ableton can not?

[Machinesworking]

a few of the obvious things that Logic has that Live doesn't:

-support for sheet music (scoring / music notation)
-vocal comping and quick swipe tool
-automation curves
-advanced MIDI editing operations (transform window, event view, etc.)

Logic can support a higher track count and a larger number of active plug-ins than Live. It has better support for various kinds of sync than Live does, or so it seems from lots of posts on the subject. I haven't tried doing much synching in Live myself.

I use Live exclusively these days, even for tracking and comping vocals, FWIW.

-Luddy

Couldn't imagine comping in Live, haven't tried Logics comping, but DP7 has really straightforward comping.

I would say Logic, DP and probably Cubase and Sonar have better comping, and more mix automation types as well as curves. Hell, DP has something like 6 types?
Simple explanation of the difference between Live and any of the aforementioned DAWs is Live is absolutely stelar at quick and dirty, plus it's massively intuitive in it's approach, Logic etc. are not, but the pay off is when you're an old hand at Logic/DP/Cubase etc. you get a lot of nice tricks up front, in Logic Capture last take as recording, for MIDI, any MIDI you play into Logic is recorded on the record armed tracks you played on, so you can save any messing around you did that sounded good!
DP has multiple mixes available for any song you're mixing down, so you can save a mix that sounds "OK" mess around and save the new mix and check to se if you're getting ear fatigue etc. There are a ton of other things, basically Logic is an OLD DAW, and it's got a ton of hidden features, while Live is young and loud and active and not as "mature". Notice I didn't say it's worse, it's more like Logic is a MILF and Live is a Nubile, advantages to both.

[kanuck]

Couldn't imagine comping in Live, haven't tried Logics comping, but DP7 has really straightforward comping.

I would say Logic, DP and probably Cubase and Sonar have better comping, and more mix automation types as well as curves. Hell, DP has something like 6 types?
Simple explanation of the difference between Live and any of the aforementioned DAWs is Live is absolutely stelar at quick and dirty, plus it's massively intuitive in it's approach, Logic etc. are not, but the pay off is when you're an old hand at Logic/DP/Cubase etc. you get a lot of nice tricks up front, in Logic Capture last take as recording, for MIDI, any MIDI you play into Logic is recorded on the record armed tracks you played on, so you can save any messing around you did that sounded good!
DP has multiple mixes available for any song you're mixing down, so you can save a mix that sounds "OK" mess around and save the new mix and check to se if you're getting ear fatigue etc. There are a ton of other things, basically Logic is an OLD DAW, and it's got a ton of hidden features, while Live is young and loud and active and not as "mature". Notice I didn't say it's worse, it's more like Logic is a MILF and Live is a Nubile, advantages to both.

I'd agree.. we have to observe that the bigger DAWs have been around longer than ableton. Ableton has the unique factor but are still catching up in the traditional DAW department.

[wehkah]

The feature which i really miss in Live is the total recall function for Midi. It was very useful.