It looks like this lite version loads all the map imagery as images (tiles) from the server. This compares to full version which uses Javascript to render some

It looks like this lite version loads all the map imagery as images (tiles) from the server. This compares to full version which uses Javascript to render some of the roads and symbols as some kind of vector drawing on top of less detailed map tiles. I'd expect the Full version to require slightly less data transfer and behave better when zooming in and out rapidly. When you zoom in on a vector drawing it still looks sharp, so you just have to wait for more detailed roads to appear. Whereas in Lite mode, you'd zoom in and stare at a blury tile until the higher resolution one loaded. I'd expect Lite to work better in a browser or network that just can't cope with a web application. Old versions of IE, weird embedded browsers in smart TVs, that sort of thing. Given what it is, I wouldn't expect it to work better.