Difference between the VNLD5300 and VNLD5090
They should indeed to be functionally identical, with the VNLD5090 having a more powerful internal switch and better (lower) thermal resistance. But it also does have a larger gate charge which you may need to consider, especially if you are switching at a high frequency.
The high current is possible due to the low RDSon, which means less (thermal) power dissipation in the switch.