I have a SCTE 2.0 and a MIP SCTE. My brother drives the SC10 4x4. Out of the box the SCTE drives great and with fine tuning it can run at any track, the SC10 4x4 is a different story. We have changed everything we can and the truck just has no rear grip (loose), the only way we can get it to run outdoors is by adding weight to the rear of the truck. We have changed the ackerman with the exotek steering plate. Raised the rear ball stud and rear hub to change roll center. Changed the rear brace to add rear toe. Everything we do helps a little and all together the truck runs decent. By adding weight we have now melted the slipper clutch, and we had problems with the rear diff (fixed now). If you decide on the SC10 4x4 be ready to put some work into the truck.
Never drove the Tekno but its next on the list to get.