[Vocabulary] specialty vs specialization

[Hope!]

Hello!

Searching the internet I came across the following definition: "[h=2]As nouns the difference between specialty and specialization[/h][FONT=&quot] is that [/FONT][FONT=&quot]specialty[/FONT][FONT=&quot] is that in which one specializes; a chosen expertise or talent while [/FONT][FONT=&quot]specialization[/FONT][FONT=&quot] is the process of specializing. "

I also came across this sentence:"[/FONT]Brian is a linguist whose specialization is phonology".

According to the definition above, shouldn't we say "....whose specialty is phonology"?

 

[teechar]

There is overlap between those two, and in that example, either can work.

However, e.g.,

You'll have to try the ice cream here. It's a local specialty. [Here, "specialization" would be wrong.]

The specialization of labour is key to economic development. [Here, "specialty" would be wrong.]