Barbosa and Terry actually average exactly the same steals (1.4) and turnovers (2.2) per 36 minutes over their careers.
Where did you get those numbers? They aren't accurate. You are right that Terry and Barbosa have very similar career numbers in those categories, but they are not exactly the same according to any basketball stat site I can find.
In any case, maybe I wasn't clear enough in my post, I was specifically referring to Barbosa's recent seasons in Toronto/Indiana. His turnover rate last season was 3.5 per 48 minutes, which is pretty abysmal. He was 2.9, 2.9, and 2.8 the seasons before that. Discounting his rookie campaign (because that's not fair), his Phoenix averages were around 2.5-2.6, just under the league average. Basically, if he can play like he did in Phoenix, I will be happy, but if he is turning the ball over as he has the past couple seasons he will have a net NEGATIVE impact on our team.
As for Terry, he turned it over 3.1 times per 48 minutes the past two seasons. Which is still bad. The years before that, he was averaging around 2.2ish per 48, which is great.
In any case, Terry's turnover rate the past couple of seasons is bad, and I hope he is better about that this season. Unlike Barbosa, though, Terry makes up for it with consistently good defense (gets steals, doesn't foul ... barbosa gets steals but fouls a LOT ... last season 5.1 times per 48 minutes! And 4.3 per 48 for his career. League average for a wing player is around 3.5. Terry has averaged 2.9 fouls per 48 for his career, and last season was a stellar 1.7).
Actually, Terry-Barbosa is a good comparison (statistically, not in terms of play-style). Basically, Barbosa is just a less consistent version of Terry ... his averages are approximately the same, but he has had a couple of bad seasons in a row, and hopefully he bounces back the other way.