Off-topic, but, I'm sorry, what is difference between Talkroute and Line2... outside of Line2 costing 50% less, allowing multiple in-bound numbers, and also sup

Off-topic, but, I'm sorry, what is difference between Talkroute and Line2... outside of Line2 costing 50% less, allowing multiple in-bound numbers, and also supporting toll-free numbers and free existing number porting?