Question about Electrolux WASL5T300

As already mentioned, the difference is in the capacity/spinning speed.
In retrospect, I would have bought the other model with 7kg load capacity because I have a lot of bed linen and I usually "only" run my machine at 1200 rpm anyway, which I don't think brings any noticeable disadvantage.
At 1500 rpm it gets so loud that you could think it's going to explode at any moment.