Brushless Battery

Question about the R/C brushless motor?

I know that the motor has KV and the maximum A
for ex: I have one :
D2830-1300kv
-Rpm(Kv): 1300 Rpm/V
-Max Currect: 28A
-Max Eff: 98%
-Total Length: 50mm (Motor and Shaft)
-Motor Body Diameter: 27.9mm
-Shaft Diameter: 2.96mm(Front)
-Shaft Length: 18.6mm
-Recommended Input Voltage: 6 – 18 Volt
However,
there’s another also is 1300kv
300XT Brushless [...]