I am currently car-less, I havent been able to race since March of this year and so sold up sometime ago....
Before that though my last two cars were the DB1 and then followed with a TM2 and if you are choosing simply between these two, then I would buy the TM2 everytime. Even if they were the same price.....
Both are great cars, but for me the DB1 was too loose on low grip, things like vinyl indoors or a damp track outdoors. It was so bad it was almost a waste of time (IMO with my driving skills) whereas the TM2 was much more reliable.
Im not going to say that it was planted on low grip like a rear motor car would be, but in a straight comparison with the DB1 then the TM2 is much the better all round car.