Garland and Grand Prairie have a similar cost of living.
When comparing Garland, TX and Grand Prairie, TX, the overall cost of living indices are 96 and 98 respectively (national median = 100). Rent is $55/month cheaper in Grand Prairie, saving renters about $660/year.
Median household income is $4,172/year higher in Grand Prairie. Home values also differ significantly — the median in Garland is $248,900 compared to $272,200 in Grand Prairie.
Both cities share the same state tax structure since they are in Texas.
Garland vs Grand Prairie — common questions
Other cost of living comparisons for Garland and Grand Prairie