Looking to upgrade to either a T5070 or a T4-110. The T5070 is a 2012 with 400 hours, T4-110 has 300 hours on it, 2016 model. Both are priced the same. I like the fact that the 5070 is pre TIER 4. Other than that, is there much difference? I'm just not that familiar with the T5070, I have...