As an m6 owner, ur concern is also my concern. I choose m6 at the end. But comparing a 2.5 teana and 2.0 m6 is abit absurd. M6 will definitely win the fc. Check my siggy about the fc for my 2.0 m6

Why worried about maintainance cost. U got a free 3 yrs or 60k free service

Toyota is also only offering low quality downgraded cars in Malaysia. Altis supposed to be global standard? Vios? Camry?

Also you don't know if internally the ASEAN Camry is the same with the US Camry. There was an article recently where they've shown that Latin American cars are less safe than European cars... despite being the same model. They have fewer welding spots (reducing production costs), lack beams meant for strengthening, use lower quality materials, thinner materials, ... there is a lot that can be done to cut costs. I mean, they remove stability control and airbags to save cost... things the customer will actually notice. You think they may not have internal changes too, to make it cheaper to produce?