+1 on a CE2. Much better option over the EgoT. I wouldn't really call the ego battery an upgrade over the volt for anything other than a greater mAh rating. The volt has a higher regulated voltage than the ego does. It's not a world of difference but it is a difference. The only other plus would be being able to use low resistance gear and the "ego booster" from artisan vaping
Artisan Vaping | Home of the Ego Booster which would give you 3.2 - 4.7v vv on the ego (but lol it's going to be pretty long with that on there too with a 1100mAh battery). And hey you're better off in Canada to get one because they're made in Canada!
But for the price of all that you're probably better off buying a vv box mod or something or stepping up just a little more money for a really nice vv or some cool box mod that costs half as less an ego.
The battery is maybe the least important aspect of your ecig. Unless you buy a 5v or higher than around the usual 3.7v batteries, it's probably the heating element/device that's going to make the difference. Low resistance atomiser/cartomiser or a CE2 or pretty much just anything but an Ego-T on an ego will feel like a longer lasting equivalent or upgrade.