Although this might be mentioned elsewhere (and it is no surprise) the 1055 will do better in highly threaded apps and the X4 will win in <4 threads, however in either case the difference will not be huge. Both chips are about the same power/temps as well. In gaming the X4 probably edges the X6 out. In 3-D modeling, often some parts are infinitely threading and some are single threading, so it would probably be a tie.
if you be using the computer for Photoshop, basic 3d modelling. then 1055t will be better choice as you have two extra cores. at the moment most 3d apps will use all the cores, beside i remember the days when games only used one core and then games like crysis came and utilized more cores,you never know what programmers will come up with. i guess what i am saying is if you can get more for your money and future proof your self then why not. i am getting 3 of these babies for a render farm i am making for a friend.