Newegg has a pretty awesome pc builder too, not sure if they do Canadian tho.. Putting them together is pretty simple process. You'd be able to build a better PC for the $ this way, rather than buying a prebuilt tower. For me, I enjoy trying to get the most bang for my buck while checking out the new products.
AMD and Nvdia use different ways to identify what you are getting.
3060 = 30 generation / 60 series
3070 same generation but slightly better card.
40 gen is the newest card. 4090 being the best.
anything with ti after it is like another 1/2 step up. Both #'s are important. An older generation card that is higher in series can outperform a newer generation lower series card.
sooo, a 4060 could be outperformed by 3070ti or many other older cards.
AMD stuff is rated nearly the same although I am less familiar with it.
Comparing the 2 can be difficult. AMD in the past has been a bit of an underdog, and slightly cheaper to piece together. These days, they are so close in price and performance that it's really just a preference.
Here is nearly an identical machine to mine for around 2100 CAD