Mr.CB, I'll take a guess. The -200 TR is SriWijaya and the ATR is Wings Air, both of Indonesia. SriWijaya's agent is Andy Yeap of FlyGosh.
Your choice is ultimately your own decision. I guess you prefer both an airline-sponsored TR and job security (who doesn't ?). However if you can only choose one, you'll have to bit the bullet and decide which is more critical for your future career progression.
Thank your lucky stars you have a real choice. A lot of pilots don't even have that luxury. Good luck anyway.