We do not prefer one over the other. However, we urge you to explore of the benefits of the downloadable version versus the web based version. I can tell you that most of our customers who trade the spreads do so on X trader while some that do straight single futures do that on the web based version.
We can not say conclusively if one if faster than another because that also depends on your computer set up and your internet connectivity. However, there is a significant different cost structure between X Trader and TT.
X Trader has a cost structure per month while TT has a transnational cost associated with it. Our clearer AMP Clearing currently is the one offering transnational cost structure over X Trader.
If you are going to trade from many places, we suggest to go for the NEW TT
Please let us know if you have any additional questions.