Unfortunately as Officer of the Engineers rightly brought out there are very few Indian Army professionals retired or serving who put forth their views on topics like the t-90 vs the Arjun for reasons only known to them.It only adds to the confusion in the minds of the uninitiated and have them to ask you on the merits of these tanks!These boys will then lap it up , go back to the Indian Defence sites with baised views and expound theories on tank designing which are astounding to say the least. The Indian media are as cluless on matters military and will print on what has been fed to them.You must visit our sites for the gems on military knowledge.
My humble opinion on the these tanks in question- both are required. The t-90 when India was at a risk of being out gunned by the t-80s was the fastest we could get to counter the threat ,cheap vis a vis the other tanks available then, fast delivery[the russians stood by us] ,enough to meet the requirements of the sub continent, soldier proof like all russian equipment, good night fighting capablelity,minimum operational maintance,etc.
The arjun -delay after delay made the Indian army vexxed as operational requirments dictated an stop gap asset. The DRDO just could not convince the users that they can deliver. When they could pigheadeness by the army saw further delay.Smooth suspension, crew comfort good, good gun, good sights,the MTU power pack question mark,will the germans give us the leopard 2 power pack? the maintance procedures, spares ,tote, etc will have to be smoothened out.The mark 2 will be better i hope.We require it to progress into the future .unforunately, the DRDO is so bogged down sorting out the Arjun ,I hope they have started working on a new tank!