There are a few lower-priced models of the Dime tribute guitar that are in the $300 range (here's one: http://www.musiciansfriend.com/product/Dean-Dimebag-Blade-Tribute-Guitar?sku=512929). There are several different levels on the Hammett that all look essentially the same and have essentially the same features. There are differences in the materials used, and the higher end models have a neck-through construction, while the cheaper one has a bolt-on neck. One of them is in the $400-$500 range, but it's branded as an LTD, not an ESP. Is this the one you bought: http://www.musiciansfriend.com/product/ESP-LTD-KH202-Kirk-Hammett-Signature-Electric-Guitar?sku=516639.

Both could be legit budget models.