I read that the former suffers from control problem, but I love the art style. The latter is compared to Tensui. Which one should I get?
They're both stealth games. Similarities more or less end there. Watch videos. Take the one you feel more compelled to buy. I'd suggest both though. Both have drawbacks. CounterSpy has mild to moderate control issues, but is far more polished. Stealth is a one man effort and in some ways shows it. To be honest, I'm getting more mileage out of CounterSpy.
I'd go for CounterSpy but only if you have a 1GB RAM device (iPad 3+, iPhone 5+, iPad mini Retina) as it's quite unstable in older devices like mine.
For Australians - it is Stealth by default. SCEA is not releasing the game to Australia and no one knows why. <sigh>
Weird, NZ has it. My vote would be CounterSpy also, highly underrated game - but more of a rogue like than puzzle based.
Just to let you know that Stealth is at 1.99$ for a few days to celebrate the good Touch Arcade review (4/5)