The distinction is that the maximum you could get if you proceeded by way of summary conviction is two years. It's not as if there's a minimum penalty for the summary conviction offence. It's what the maximum penalty is for a summary conviction.
There is that difference. But certainly in terms of damage to a structure such as a building, I just wanted to make sure people understood that it would fall under the general mischief offence offence with the higher threshold for punishment.