It's a moot point because of how volatile prices are right now.Got my PNY 5070 for $550 when no one wanted them. Plenty fast, efficient, and quiet (for now). Thought the 5070 Ti would've been the pick of the litter, but not at $900+.
Don't honestly know what's going on with the 9070 XT. Scalped one at launch but why would I run a more expensive card with fewer features at 300W+? As the article suggests, if the Ti's are starting to show up from $830-870, how can the XT be justified >$750?
But in general, it's because it's much faster in raster and trades blows in ray-tracing. Prices do vary a lot depending on the country. If it's close enough then it's worth buying the faster card. the 5070 isn't exactly known for its good value