Peppers vary greatly with the amount of heat they possess. From bell peppers to pure capsaicin, the range in Scoville units (that's how they measure the spicy heat levels) goes from 0 - 16,000,000 SHU (Scoville Heat Units). And, individual types of peppers also range in heat level so you can eat a jalapeño almost as mild as a bell pepper or one that tastes very hot. Variables such as season, region, rain fall amounts, temperature and soil quality can change the level of Scoville units in individual types of peppers.
A little information about habanero peppers and how to chose the right Burnin' Beak Habanero Pepper Jelly for you:
Habanero peppers are rated between 100,000 - 350,000 units on the Scoville scale with 2,000,000 being the highest level.
The perceived heat level also depends on your palate. If you have very little to no experience with spicy foods, you may find the Mild Habanero Pepper Jelly surprisingly warm.
If you have many years of experience with hot peppers and love highly intense heat, the Super Hot is for you.
The Hot variety is in between, providing quite a bit of heat without making you run for the fire extinguisher.
By the way, if you happen to choose a hotter variety than you're ready for, don't pick up that water glass to douse the flames. It will only make it worse. Grab a glass of milk or a slice of bread with butter. The fats in these foods will help dissipate the heat. Beer is also known to be a favorite heat extinguisher for some.
Here's a chart from ChiliPepperMadness.com showing some of the most popular peppers and where they fall on the scale.