this and $(this) refers to the same element. The only difference is the way they are used. ‘this’ is used in traditional sense, when ‘this’ is wrapped in $() then it becomes a jQuery object, and you are able to use the power of jQuery.
Check below examples for this and $(this) understanding:
$(document).ready(function(){
$('#spnValue').mouseover(function()
{
alert($(this).text());
});
});
//And
$(document).ready(function(){
$('#spnValue').mouseover(function()
{
alert(this.innerText);
});
})Check More on jQuery
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