A very clear defination of
Notorized copy: the copy which u get from an authorised notery at your place and who charge around 5 or depends on your city to notorise a copy. yes for sure you will need red seal. blue seals are not valid. they will also stamp their name and designation. In short you will have two stamps one is round seal which will have government of Gujarat or Government of Maharastra or such kind of writing in round seal. and second seal will have his name and designation with also again government of abc at the end with full adress of his office.
True Copy: very simply blue ink stamp of any officer just like school principal,bank manager, medical officer, engineer or any other such class two or class one office. in canada visa system. they never acept this kind of proof.
I hope this is much clear