Lattes and Mochas come with steamed milk and that does a lot to balance the more negative aspects of coffee’s chemistry. Milks are usually high in tryptophan which allows the body to compensate with the caffeine effecting it’s serotonin system, by converting tryptophan -> serotonin.
Espresso doesn’t fit into the spectrum of typical brewing. Espresso is as finely ground as it gets and steam is used to extract almost all the caffeine possible for a very potent shot of coffee.
Most everywhere uses at least two shots of espresso in their beverages.
Now coffee itself, the old slow drip, has a wide variety of flavors and they usually do range from light to dark.
Light coffee is actually the strongest. Medium is in the middle. And Dark is the lowest in potency.
The coffee with the lowest kick to it is decaf… but decaf still has a noticeable amount of caffeine when consumed. I haven’t confirmed it myself and it probably varies, but my mom was saying about a 4th the caffeine.
So yeah strongest to weakest… Espresso, Light coffee, medium coffees, dark coffees, then decaf.