I can only tell you of my experience with the Stridsberg MCA204m. It allows me to feed 1 antenna to 4 receivers. The fact that it is amplified reduces line loss from the added connectors (to the multicoupler and the jumper from the multicoupler to the receivers/scanners) It works very well.
The electroline amplified coupler that you were looking at would be good if you were running a long length of rg58 (not recommended) but the amp will compensate a little for the line loss boasting 15db gain. This multicoupler would certainly overdrive my PSR-600's front-end and render the incoming signal useless.
In short, I am very happy with my stridsberg. If you do go with the 4 port, make sure you put a 50 ohm termination on each unused port to ensure optimum benefits of a balanced feed.