Let's say I'm selling products from two categories: Stuff#1 and Stuff#2.

Now, the products in each category are sold in sizes: 100, 200 and 300.

So, it's easy to set an option SIZE and specify three values, 100, 200 and 300.

But what if I want products in category Stuff#1 to increase by a different amount with each size than they do in Stuff#2?

Like:

Stuff#1:

Size 100
Size 200 + $1
Size 300 + $2

but in Stuff#2:

Size 100
Size 200 + $3
Size 300 + $5

Can one option have multiple values specified by category?

The only way I can see, and it seems clunky, is to specify separate options "Stuff#1 Size" and Stuff#2 Size" and assign the different price increments to each option.

Thanks in advance.