pretty much the same thing as back counting and table hopping.
one can wong into a table when the count is favorable.
one can wong out of a table when the count is not favorable.
and one can wong in and out a given table.
for backcounting see link below: http://www.blackjackinfo.com/bb/showpost.php?p=14637&postcount=2
You are correct they are the exact same thing. The reason backcounting is called Wonging is because Stanford Wong was the first to write about the technique so it got the nickname Wonging named after him!