For same dimensions / sizes, 20 HR capacities may be different, so it's best to go for the size and 20 HR capacity, which is best suited for your car.
To just give you a tentative idea, following 4 batteries are from Daewoo. Their dimensions are same, however, 20 HR capacities are different (35 AH, 38 AH, and 40 AH). Then in 02 cases, positive poles positions are also different (DL-46 VS DR-46). Please carefully see, what's up with your car's battery:
https://daewoobattery.com/autoportfolio/dl-46/
https://daewoobattery.com/autoportfolio/dr-46/
https://daewoobattery.com/autoportfolio/dl-50/
https://daewoobattery.com/autoportfolio/dl-55/
(For positive pole position understanding, please go through this link: https://www.carwale.com/forums/26884-battery-nomenclature.html especially the 2nd and 3rd last posts)
