Application amounts
How much eau de toilette should I apply
Do not automatically apply more eau de toilette because it is labelled EDT. The appropriate routine depends on the exact fragrance, applicator, product directions and setting rather than a fixed EDT-to-EDP spray conversion.
A HUME Fragrance buying guide

Separate concentration and presence
EDT does not guarantee weak projection. Judge the actual scent during a restrained first trial instead of assuming a lighter-style label needs extra application.
Keep the first comparison consistent
Record the product and application method without layering another new fragrance. This gives you a clearer basis for deciding whether the presence suits your occasion.
Review before refreshing
Consider the developing scent and shared environment before adding more as directed. Not noticing the opening anymore is not enough evidence for an automatic top-up.
Try this before you buy
Write the exact EDT and the presence you want, then evaluate an ordinary trial before altering the amount.