Irish genealogy is a funny thing! I would search in the entire area until you find them. So yes, I would search both areas. You should always check if the record you are searching fits into the dates for that records are available. Here is a little info on Patrickswell's history:
Brief Parish History & Geographical Location Patrickswell-Ballybrown Parish
The village of Patrickswell is situated on the N20 that runs between Limerick and Newcastlewest. According to Mainchín Seoighe, the present day parish of Patrickswell/Ballybrown is made up parts of the pre-Reformation parishes of Kilkeedy, Killonahan, Mungret, Croom, and Adare. Until the middle of the 18th century, the parishes of Kilkeedy and Clounanna were joined with Adare. When the parish of Patrickswell was formed Kilkeedy and Clounanna became part of the new parish. The first parish priest of the new parish was Fr Nicholas Molony. The present population of the parish is about 3,400 people.
The church in Patrickswell is dedicated to the Blessed Virgin Mary. Bishop Jeremiah Newman and Fr William Creed P.P officially opened the church on June 9th 1977. The architects were John Thompson & Partners and Patrick Healy was the builder. The McSweeney family gave the site for the church and the Presbytery. The McSweeneys also gave the altar and ambo as a gift. The church was re-roofed in 1994.
The church in Ballybrown is dedicated to St Joseph. It was built in the period 1829 - 1840 but the exact date is unknown. Ballybrown church was originally a thatched building. A headstone to Fr Downes was found in Ballybrown church grounds in 1986. Fr Downes died on December 14th 1840 after being thrown from his horse. However, we found no such headstone in the grounds of the church.
Below are the dates that records are available for Patrickwell-Ballybrown

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Best,
Marsha