This is a totally unscientific test of these two radios.
I went up to the 11th floor lounge of our apt. building and set out to check out the Nexxtech AM/FM radio against the Grundig G8 multi-band radio. Listening only to the AM Band.
I ran the dial on both radios from 520Khz to 1610Khz. I did not ID the stations, just wanted to find out what I could hear. I was able to hear signals on most frequencies in that range. Both radios are closely matched however the G8 is more sensitive.
The G8 will pick up a station on an adjacent frequency to our local stations where as the Nexxtech is swamped by the local stations. The G8 hears weaker signals that the Nexxtech will not hear. I found that if I could hear a signal on the Nexxtech, I knew I could hear it on the G8.
The Nexxtech radio is worth the $15 sale price. It's size makes it a nice compact radio for quick listening. or taking to a sports event to hear play-by-play.
My DXing choice is still the Grundig G8 over the Nexxtech - But I'll keep the Nexxtech handy in my pocket.