advance color color1 color2 colors confused feature help individual information inventory limited page price product productsku reading scenario scenarios size size1 size2 size3 sizes sku stock variants weight

I'm still very confused about the variants even after reading your variants help page. I'm going to give you the scenarios below, please let me know if I've done it right, if not, please let me know how to do it:

Scenario 1. I have the same product in 3 sizes, each size has a limited inventory of 100
should I choose the ""Variants having individual SKU/Price/weight/stock"" feature, and will I put the information as below:

productSKU,10,5,100,size1
productSKU,10,5,100,size2
productSKU,10,5,100,size3

Scenario 2: I have the same product in 2 different colors, each color has 3 different sizes, each size of each color has 50 in inventory

productSKU,10,5,50,color1,size1
productSKU,10,5,50,color1,size2
productSKU,10,5,50,color1,size3
productSKU,10,5,50,color2,size1
productSKU,10,5,50,color2,size2
productSKU,10,5,50,color2,size3

Thanks in advance