Victron makes great quality
gear, and in this case good value.
If the controller is close to the bank you should be OK.
The higher-amp more $$$ units do allow for temp sense wire rather than just compensating based on ambient.
But I think those Dutch engineers know their stuff, even at under $100 for the 75/15.
Note you can go well over the amp rating on PV input (15A) but DON'T take any chances exceeding the 75V max.