Care to elaborate a bit more on actual technical terms? For one thing, it makes absolutely no difference what type of portafilter/basket is used as steam volume/pressure is what's used to whip milk, etc. into velvety microfoam. Also will point out that a machine like the Slayer definitely doesn't utilize a pressurized portafilter/basket, those are more like training wheels for lower tier machines.The type of cream that should be used in DeLonghi, Krups, Rancilio, Bialetti, Slayer, and other espresso machines depends on the type of machine and the type of espresso you are trying to make. Generally, for most machines, a high-quality espresso cream is recommended. This type of cream is specifically designed for espresso machines and is usually made with a combination of milk and cream. It is important to use a cream that is specifically designed for espresso machines because it will help to create a smooth, creamy espresso.
For machines that use a portafilter, such as the DeLonghi, Krups, Rancilio, and Bialetti, a thicker cream is recommended. This type of cream is usually made with a higher fat content and is designed to help create a thicker, more velvety espresso.
For machines that use a pressurized portafilter, such as the Slayer, a thinner cream is recommended. This type of cream is usually made with a lower fat content and is designed to help create a lighter, more delicate espresso.
In addition to the type of cream, it is also important to consider the temperature of the cream. For most machines, a cream that is between 140-160 degrees Fahrenheit is recommended. This temperature range will help to create a smooth, creamy espresso.
Finally, it is important to consider the type of espresso you are trying to make. Different types of espresso require different types of cream. For example, a ristretto requires a thicker cream, while a cappuccino requires a thinner cream.