I'm surprised the article doesn't mention either of them by name, but I suppose if, as the article states, "Every company is a tech company now”, then any city with a half-decent economy is a tech city now.
Bratislava on the other hand looks like it's being rebuilt almost from the ground up, has a reasonable tech scene (even hosts demoscene parties!) and also has some of the friendliest people I've ever met anywhere. Eset seems to be the anchor company.
The very low cost of living and high salaries for engineers make it quite attractive, even though rent prices keep going up it is still a very good place to live, decent quality of living, centrally located within Europe with lots of options to travel and all, I'd definitely recommend, and hope it becomes an even bigger tech hub in the future.