Travis, I'm sure Blake or someone from Speedtech and chime in here but I was thinking about this more after I posted yesterday since I don't want to mislead you or anyone else. The only thing I could come up with that would impact tire clearance on the TCI kit vs the Speedtech kit is the crossbar that the coil overs and panhard bar attach to.
The speedtech kit being a weld in kit attaches to the inside and a little bit of the underside of the frame rail only. The TCI kit wraps around both the inside and outside of the frame rail and does have two bolt heads that protrude in that area. So I could see loosing maybe ~ 3/8" of clearance this way.
Of course it is easily solved by welding in this part for the TCI kit. I know on my car we are using countersunk holes and bolt heads in this spot to achieve maximum clearance.
Here is a pic of the TCI kit with a red circle on the area I'm talking about.
Here is a pic of the Speedtech torque arm. See the area I've circled in red.
Hope that helps and good luck with your decision. I doubt you can make a bad one when looking at these torque arm kits.