That is correct , the only difference is the one in Marks picture has a connector for charging the phone at the bottom. The are really well made and mean you don't keep leaving your phone in the little slot between the seats every time you get out of the car .
Its two parts the holder and the mounting plate. The mounting plate is vehicle specific, in this case for a z4 and the holder is interchangeable and sctews onto the mounting plate. You can go onto Broadit .com and buy the charging cradle. This is a good buy for twenty odd quid. I have used these in my e86 and my 3 series, very solid.