【求助】请问OldServiceAddress = *(ULONG*)Address；与OldServiceAddress = Address；有什么区别？

在SSDT Hook的妙用－对抗ring0 inline hook这个帖子里有这么一段：
ULONG Address;
ULONG OldServiceAddress;//原来NtOpenProcess的服务地址
Address = (ULONG)KeServiceDescriptorTable->ServiceTableBase + 0x7A * 4;//0x7A为NtOpenProcess服务ID
DbgPrint("Address:0x%08X",Address);

OldServiceAddress = *(ULONG*)Address;
请问OldServiceAddress = *(ULONG*)Address；与OldServiceAddress = Address；有什么区别？望大虾指点一下。