If you are meaning to load Black Powder:
Winchester holds a few grains more ('bout 5) of powder as the brass is thinner.
Remington will hold slightly less as the brass is thicker.
I have had no experince w/ Starline.
See if you can round up a Fellow Shooter or two for the purchase. Brass gets cheaper when bought it in lots of 500. Or do you know someone w/ a fFederal Curios & Relics FFL--many dealers (Midway, Graf, Brownells, etc.) give dealer discounts to C&R holders. Best US$ 30.00 I ever spent was to have a C&R.
As far as prices, also look @ shipping costs. S/H can increase the total price & make a seemingly good deal not so good....