Does have: DVI, HDMI and Displayport, 17" (does apple still have no modern 17" notebook?), easily up to 32 GB RAM, HD 7970M, maybe a 3920XM, if you don't want to go the very expensive road with Xeons in a notebook
Does not have: Very high DPI, very high quality case.
Does it "come close" to the Geforce 650M, 16 GB RAM, 3820QM (I assume, apples configurator is not even telling that)?
By the way: the Clevo configuration costs about € 2.500,00 while the non-retina macbook (which has only 8 GB RAM) costs 2.549,00 €.
If you really think it is worth paying more for a notebook that will barely fit your needs if you work with any substantial amount of data because it has a better case, then you may buy it.