Join vs two queries

My question is meant to be performance oriented.

Suppose we have this table A
_________
int id;
varchar price;

and table B
___________
int id;
int language_flag;
varchar description;

id in B is foreign key in A.

We want to retrieve for two given id and language_flag a single row like this:
id, price, description

I could join A and B on (A.id = B.id) selecting the right language with a WHERE, but I could also extract the price and, with a second query, the description.

Which one would perform best?
See you and thanks.

It will always be faster to the the db do the join, also the lesser number of queries the less overhead necessary to parse, execute and fetch.

ok, thanks