I find it difficult to know which sub-class each fare is by just looking as the info they give is not very clear...

What I usually do is select one & look on the right hand-side. It will show you the sub-class letter. So you know what your mileage accrual will be.

I use my Flying Blue card for all VNA flights - so I refer to Flying Blue website which has it all clearly listed. I cans hare the link if you are Flying Blue too.

I know that it is also explained on the Lotusmiles pages if you are a Lotusmiles member...

Hope this helps!