here's the scoop - there are 2 official Girl Scout cookie bakeries, Little Brownie Bakers and ABC Bakers. They are supposed to use the same recipes, and make the same cookies although they use different names for everything except Thin Mints.
Our council used Little Brownie Bakers for many years, but in the last year our council was combined with several others in Iowa to make one new council. Everyone except my area has used ABC Bakers, and the new council signed with ABC.
We are currently taking orders for cookies and I am a cookie mom. At our training, we tasted cookies and the only one that is different in taste is the Peanut Butter Patties/Tagalongs. It is exactly what you described, the Peanut Butter Patties have a thicker cookie base and less peanut butter than the Tagalongs.
Here's a comparison list for the cookies
Little Brownie/ABC
Tagalongs/Peanut Butter Patties
Thin Mints/Thin Mints
Samoas/Caramel Delites
Trefoils/Shortbread
All Abouts/Thanks-a-lot (shape is different but they taste the same)
Dosidos/Peanut Butter Sandwich
ABC bakers has Lemonade cookies, I don't think there is an equivalent with Little Brownie.
ABC's new cookie this year is called Cinna-spins - they are in 100 calorie packs and taste like cinnamon teddy grahams. I don't know what Little Brownies new cookie is this year.