Gif or Flash for logos?

Hi!
I know that to create better animated logo - it attracts more attention.
It is better to use .gif or Flash?

Yes, its true. Animated logos can be very distracting and distasteful a lot of the time, however, a well designed logo will provide appeal to your overall design. Anyways, I will make a pro/con list for both types of animation. (I won't list features that are common to both formats)
.gif
Pros:
-can be viewed by anyone using a web browser more or less.
-simple creation/doesn't require much work.
-doesn't require specific software to create. lots of free software will allow you to create gif animations.
-does not require much CPU power.
Cons:
-pixel based image format (inferior quality, scales poorly)
-small color palette
-can't contain any audio
-can't contain interactive features/user input (buttons, rollover, etc...)
-larger file size

Flash .swf
Pros:
-vector based animation (better quality)
-cleaner animation - therefor much more aesthetically pleasing
-scales better
-smaller file size
-will accept user input/supports interactive buttons/rollovers, etc...
-can contain audio
-wider selection of colors
Cons:
-Only viewable by viewers with Flash Player installed (probably not that big of an issue these days. Everyone has flash installed practically)
-vector calculations require more CPU power
-creation and coding can be complicated and time consuming
-requires special (expensive) software (Flash Pro CS4)

Using the list I made, you should be able to get a good idea of which format is more practical for you. If you really are determined to do animation and you have the available resources, Flash .swf would probably be a better choice in my opinion.

only flash (with proof

Without any explanations , simply FLASH , just see difference between page with jpg baner (before) and with my flash baner (now) , before was 4.000 visitors ... after month u can check it : 32.000 visitors . so i prefer flash , here u can see proof :
just find on DRUKARZ blogspot kom


btw. sorry for my english

For me, I prepare flash because its much better in animation and because it was vectored the image can be stretch in a bigger scale unlike to gif.

as long as the Flash logo does not take a long time to load, then use Flash.

I'd rather use flash. After Effects. Its cool. so smooth.

It is better to use flash for getting good results.

Great explanation dude. This is very helpful to newbies like me.

gif logo is very old fashion. In flash cs4 u can make cool and elegant logo

Flash for me. good quality

I honestly don't like animated logos either....VERY distracting and actually quite tacky. Lots very unprofessional and advertisement-y. Simple, plain and clean draws more attention.

Flash is more powerful Rather then gif animation

i prefer flash because we can do wide range of animation where in GIF you cant get the good quality result.
My opinion is animated logo in website dont required .coz user will feel very awkward .
stable logo is better in website unless you are using a full flash website

I am with @chococheese, I also suggest you to use flash for logos.

When you compare to the file size, gif is better. Flash takes time to load. So i had recommend you to choose gif