difference of $20 u can get more road holding(more safety). but i think for ur case the fc is more important than the road holding... so y not ask those on altis (185/70/R14) to change their tyres n rims with u then ur comfort and fc will greatly increase since u rather save on $5 bcos afraid of fc suffer... those who know abt car will tell u that tyres are the most important part of the car. u can save on anything but tyres. cos they are the only point of contact with the road.. pls do not mislead people that they are being CON to change their tyres to 195/60/R15 or 205/50/R16 or 215/45/R17.... Pls if u have time go to tyre shop to ask them y need to upsize tyres and rims and see what they say..
Everyone will have their own thoughts on tyres.
Having changed several sets of tyres over several cars, my observation is as follows:
1) Fuel consumption increases with broader tyres
2) Higher tendency to get kerb rash with lower profile tyres
3) More bumpy ride with lower profile tyres
4) Lower profile and broadewr tyres are more expensive to purchase
5) Stock tyre sizes, most of which come in '185' on 15 inch rims are sufficient for Singapore's speed limit, and Malaysia's North South Highway speed limit, unless you intend to take an aggressive cornering and subject your life and other road users and pedestrains' lives to danger.
6) Stock tyre sizes, with a broader tyre height, offer better overall comfort
No matter how broad your tyres are, Latio with high CG & height does not help much and all you need is a patch of oil on the road to get your car spinning or turning turtle
* By the way, 195/60R15 on stock Latio rims will result in tyres bulging out of the rims. Just look at the 1.5l Sylphy.