Bacillus Bulgaricus starters of the same name and size generally contain the same amount of starter, regardless of the starter type, unless otherwise noted on the package.

Here is a chart that shows the contents in gram per package name and size.

SMALL – 0.5 L / 0.5 qt — Contains 0.5 grams of starter.
SAMPLE – 1 L / 1 qt — Contains 1 grams of starter.
SINGLE – 2 L / 2 qt — Contains 1.5 grams of starter.
DOUBLE – 4 L / 1 gal — Contains 2 grams of starter.
PLUS – 8 L / 2 gal — Contains 4 grams of starter.
EXTRA – 16 L / 4 gal — Contains 6 grams of starter.
PRO – 30 L / 8 gal — Contains 8 grams of starter.
FIFTY – 50 L / 14 gal — Contains 10 grams of starter.
LARGE – 60 L / 16 gal — Contains 13 grams of starter.
XXXL – 100 L / 26 gal — Contains 20 grams of starter.
INFINITY – 150 L / 40 gal — Contains 25 grams of starter.

MINI – 4 L / 1 gal — Contains 2 grams of starter.
BLOCK – 10 L / 2.5 gal — Contains 4 grams of starter.
WHEEL – 30 L / 8 gal — Contains 10 grams of starter.

Check this article to see the gram/Liter chart and to find out how much starter to use for different volumes of milk.