Сейчас почти во всех эпифонах датчики - реплики самых удачных от Гибсона. Так что с качеством там все должно быть в норме. Хотя конечно бывают особенности, как и у всего китайского. Конкретно на 60й модели должны быть Probuckers, которые близки к классическому PAF.
Вот кстати про этот шум на хайгейне даже есть в описании...
The ProBuckers are designed to have as PAF-ish of a tone as possible. This particular set will have a pronounced midrange and low/"vintage" output, especially the PB 1 & 2. (The PB 3's output is on the high end for PAFs - think of it as "hot vintage"). The mismatched coils allow for a lighter, more airy sound; on certain amp settings, it can sound almost single coil-ish when clean. This mismatched coil spec reproduces a common phenomenon observed in many actual PAFs. The drawback, though, is that you'll get a mild hum on high gain settings. I've always been able to get rid of that hum with a noise gate, and it's very mild anyway - less noticeable than a typical single coil on high gain, for instance, but it's worth mentioning.