I own a TA05 and a 415MS, the 415 is a faster, more adjustable car, but for a lot of people it can be very easy to get in over you head on setup with. The 05 is a very stable, forgiving, and easy to setup car so for a lot of people that translates to a better car, so that is why a lot of people prefer it. I myself use the 05 when I just can't get a setup down for the 415, but the 415 properly setup is a faster car for me. It all really comes down to personal perference and how good you are at setup. That being said the 05 is still a very capable car and with the proper hopups and setup can be very fast.