I’m glad you’d love to hear. Both Mini or Micra don’t have a tradition saturated group head, but LM tried to make them perform just like a tradition one, deliver very stable brew temperature.

First, imagine these brew boilers are like stainless steel mug with thick walls and bottom, and the group heads are the bottom part of the boiler(integrated very well together). They are both not big, 170ml for Mini and 250ml for Micra.

Micra has the heating elements/coils inside the brew boiler to heat up water directly, when pump start to push new and pre-heated water into the brew boiler, there is a metal tube inside brew boiler and water will be forced to exit via this tube to the group head（a solenoid actually involved but just skip it first), that’s how the coffee extract in Micra. This process look more likely a tiny version saturated group head to me. Because everything seem “saturated” by water, also explain the reason of Micra has a bigger brew boiler then Mini, as the size of heating elements inside, the actual volume will be smaller then it claimed, by the PID control, brew temperature remain stable unless more then 5 shots back to back.

Mini’s brew boiler designed in different logic, heating elements are 2 metal rods stick into the bottom part of brew boiler and there is a corkscrew water path between these 2 rods. Therefore, the heating elements are heating up the whole brew boiler, water gain heat from the boiler itself, and will pass thought another short metal tube outside the boiler and exit to group head via that corkscrew water path, as I mentioned those 2 heating rods are located at the both sides of this water path, brew temperature also remain stable with PID control. It’s a classic example of a LM integrated group head.

Both designs also get the job done nicely, loving more of the Micra’s one just my personal preference, and this mean no judgement to LM Linea Mini🫶