ᐅ Thermal Storage in Aerated Concrete: Does It Get Warm in Summer?

We have a meeting with the first building contractor soon to discuss the offer. The question remains whether to use sand-lime brick or aerated concrete as the inner layer for the exterior wall:

Wall structure: 175 mm (7 inches) sand-lime brick or 175 mm (7 inches) aerated concrete || 160 mm (6 inches) mineral wool with 0.035 W/mK || 20 mm (1 inch) air gap || 115 mm (4.5 inches) facing brick

The house will be located in a quiet residential area. For us, the question is whether thermal insulation (0.154 W/m²K versus 0.2 W/m²K) or thermal mass is more important.
Does anyone have experience with a wall build-up using aerated concrete? Does it tend to get warm inside during the summer?
The interior walls will be 115 mm (4.5 inches) sand-lime brick or, in some areas, 175 mm (7 inches) sand-lime brick.

Thanks for your opinions.

Facing the same question, does anyone have an idea?

The question also is, what kind of facing brick (color) to choose? A dark brick can easily heat up 30 degrees Celsius (54°F) or more above a lighter one, and the heat naturally penetrates further inside...

For us personally, the walls aren’t even the main issue; it’s the windows that really heat up the place in summer, plus the dark flooring where the sun shines directly, and so on... I would have preferred to invest the money in roller shutters or a geothermal air exchanger for the mechanical ventilation system.