I usually use Best Press, but funds are kind of tight this week and I saw Aerosol can of spray starch for considerable cheaper, so i bought it, i haven't used it yet but my question is:

what is really a difference between starches when quilting?

TIA

Best Press is more of a Sizing rather than a starch. Starch I find gets stiffer depending on how much and what kind is used.

You can buy sizing in a spray can at the grocery store or Wal Mart. It is much cheaper than Best Press. I think mine is Niagra brand.

I've always been happy using Faultless. I buy the heavy starch.

What is Sizing???

I wasn't sure how to answer this, so I googled and this is what I found. I am sure there are other definitons, but this may help.
Faultless Brand says: Sizing makes ironing easier! It restores original body to fabrics without leaving a stiff feeling. It's perfect for all washables, including cottons, knits, synthetics, and blends. Great for touching up wrinkle free fabrics.

I bought the Niagara in the non aerosol. When it was half empty, I filled it with distilled water. It was perfect. When I went to buy a new one, neither store had it, so I bought an aerosol. Yick. White flakes all over. I know they'll brush off, but it's not what I wanted. I bought sizing, too, so I'll try that next.

I buy liquid starch in a big blue bottle. (Can't recall the name) and mix it myself with water. I like about 4 parts water to one part starch, but you can choose your own strength. I also add about 1 drops of lavender oil to it and shake well before using. It's so much cheaper, and it smells nice too.

I love the Niagra brand and I get mine at Wal Mart too. Its Grrrrrrrrrrrrrrrrrrrrrrreat!
Johanna in WI

I'm a cheapo..I make my own startch..

1 cup Sta-flo concentrated starch ( get it walmart)
1 cup of Febreze (love the lavender scent- also avail at Wally world)
1 cup distilled or baby water

Mix (I use a clean spaghetti jar, pour every thing in, tighten lid and shake! Dd loves to do this, have at, knock you socks off DD!) Pour in a fine spray bottle ( I suggest you do this and not a 5yr old DD, It was not pretty! I used an empty Best Press Bottle) TaDa!