What can scissors do a knife can't?

In one of my set ups, I'm trying to pack the most useful item, and eliminate similar ones. At odds with each other are a Gerber multi-tool and a Swiss Army knife Fisherman model. The key items are that the multi-tool has a saw blade and the knife has scissors. My thinking is that I'd rather have a saw blade and not scissors, than have scissors and not a saw blade. I don't want to buy another piece of kit that has both. So, are there any instances where you'd absolutely need the scissors where a conventional blade wouldn't do the job?

Paper,Rock,Scissors? Inuit sew garments for possibly the most hostile climate on earth with an ulu, thread and needle. Leave the scissors at home to cut out articles on your survival ordeal and ultimate ordeal for the scrapbook.

If you had a LeatherMan Wave you wouldn't have to decide. <img src="/images/graemlins/blush.gif" alt="" />

At this point, there is no decision needed. I see no reason to need the scissors, hence the question. Besides, I wouldn't buy a Leatherman, but that's another topic altogether.

Neatly cut moleskin to fit where it needs to go.

My tiny EDC SAK scissors are enough.
I'd make a hash out of the moleskin if I tried to use the knife blade. (yes, it's very, very sharp but it would stll be ugly)

EMT Scissors are important to safely cut clothing off an injured person without moving them excessively. A knife with a sharp tip would be very dangerous. You might justfy the scissors for first aid applications.
What are you planning to use the saw for? In many cases wood can be broken to shorthen the length. If it is for fire then don't cut it just burn it in half or burn one end and keep pushing it to the center of the fire as it burns down.
On the other hand both saws and scissors are specialty items when compared to a knife so maybe you don't need either.

It can trim stray moustache & beard hairs. [And nose hair, but let's not go there <img src="/images/graemlins/cool.gif" alt="" />]

You can't run with scissors. But you can apparently run with a knife.

I mean, according to my teachers when growing up...

Survival kit/BOB: Multitool

EDC: SAK (though not my first choice, nor my second one. I'dd buy a Wave...)

OK let's have a vote: who prefers the Wave/Charge Ti?

I just switched from my LM Super tool that I carried for 8 years to the new LM Wave. I found I was using the blades a lot more and really wanted to be able to open them with one hand. My wife prefers that I use the scissors to cut things like wristbands and such off of the kids instead of a knife blade.

Wave is really nice. I took it on my hiking trip to the top of Mt. Whitney. Used it repeatedly to cut things and on one occasion to repair my portable stove.
Its a very useful tool, unfortunately a bit on the heavy side.

I'll vote for the Wave

I upgraded from a plain leatherman to the Wave six years ago. I wear it nearly every day on my belt, except to the office. I have a SOG that stays in my briefcase for the office. The reason the SOG is in the briefcase and the Leatherman is at home, is because I use a multi-tool about once a year in the office, but nearly everyday at home, ie: I don't care much for the SOG. I know there are some on this forum that dislike Leatherman, but I love my Wave.