I used to play only with the TE stuff, but have been using EIO with all the 1.7 packs and I doubt I will go back. As some have already said, TE itemducts are laggy unless you set it up correct with a trash, which I find annoying now that I can just use EIO conduits without that problem. EIO also gives the ability of more compact systems, which is really nice when you come to a point with pretty much endless chains of machines all over the place. What I do like with the TE stuff is the usability, they are way quicker to setup and use, cheaper and have a better filter system IMO. I really miss the fluid filters in EIO. I'm playing mostly skyblock (as I'm playing on a calculator which can't handle much else) and have found it annoying that you can't reach those configuration plates on EIO conduits if they are placed under an inventory block, unless you are standing two blocks below the position of the inventory block, which causes some problems in early game skyblock with a 1 block thick platform and no jetpack. It forces you to place your machines or whatever 1 block higher than you normally might do, which isn't an issue really, but annoying.