That is untill you hold side-by-side pics and notice the shape of the SS is off in a LOT of ways, most prominently in his T-visor. But also in the width of the helmet, as well as missing the triangular shapes on his "forehead".
Medi's Fett has a great sculpt, not so-great paint. Sideshow has a very bad sculpt, with good paint apps but far too brightly green. My Fett has Medi's sculpt, with Tomy's sides, with Sideshow's rangefinder. All repainted. It's weird how Sideshow put so much details in the paint apps to get the scratches júst right, but then completely neglected things as the earpiece's shape, the triangles, the T-visor, and overall shape of the helmet.
Franken-Fett is the way to go for me.
If you're not so much into the details of Fett, which you probably aren't if you like the SS that much, then more power to you! For me, SS is just not good enough for 200$. The quality is nice, but it lacks in certain details my OCD cant handle. Though mine ended up costing wáy too much to put together and still has things I am not quite happy with. (color of the flightsuit I dyed too blue)