Generally, mulltiswitches are engineered to include low gain amplifiers to compensate for insertion loss. Because satellite receivers have input windows that are over 30dB wide, insertion loss through switches is of no consequence in most applications. The numerical signal strength number is not a measure of signal strength.
As far as I can tell, all the low priced consumer grade DiSEqC switches are junky in quality and so if you used another identical Pansat switch and another identical Chitea switch. your results could vary significantly.
I bought a couple Chieta 2x1 switches NIB from eBay for a few dollars each for use in a stacked LNB system, but their isolation above 1,500 Mhz was non-existent, even though the labels pasted on them said they worked up to 2.4 Ghz.