It is a slightly bigger screen on the Etrex Touch. But seems it is lower resolution than the 20x/30x.
I've found the higher resolution to be a bit of a double-edged sword. It
is nice - but if your near sight is not excellent, it is also a problem, because lines on the map are just thinner, the Track line is thinner, the text is smaller including text in the data fields (I think, haven't checked this out thoroughly). I toured recently using the E30, and packed a 30x as a spare.