From my experience, I'd say get to know about the job profiles first and then select the company. I was placed in TCS but didn't join coz I'll be going for higher studies (I'm a student of BE). My frenz placed in both the companies haf joined. They say training is the same, a rigorous 9 to 9!!!
However, you don't get to choose your domain of work 99% of the times. Has happened wid many of my seniors. Those who were put in Mainframes are stuck in there, those in testing remain there. Thats coz they/(even my batch who joined this year) didn't get to choose their area of work.
So, jus coz of 10k/year increase in salary don't join CTS. Join CTS if you wanna get into the testing domain. Hell lotsa frenz/seniors of mine haf been stuck to the domain where they were initially put. They can't get into something else now.
Forget about the company, you won't stick to it for more than 2 years anyway. Give proper attention to the field in which you wanna get. Remove CTS/TCS from your mind. Focus on either Testing, Developing now and choose a job!