As it is fairly common knowledge that young people are generally more progressive and left leaning politically, would reducing the voting age to 16 benefit left leaning parties at the expense of right wing ones?
Or, as is the case in a country where conservative parties get more votes than progressive ones do, would conservative parties actually benefit the most as parents will force their kids to vote the way they do?
Another possibility is that it would make no difference at all and the voting patterns of 16-18 year olds will be similar to that of the rest of the population.
In Argentina, where it was lowered to 16, the government was accused of using the youth vote to get back into power (but maybe that was opposition just being opposition). If I'm not mistaken, Christina Fernandez, the Argentinian President, is left leaning herself.
Argentina lowers voting age to 16 - Telegraph