LED-drivers FAN5331 and FAN5333
Yes, you could. They stated it themselves that they are pulse-width modulated (PWM) current-mode boost converter if you read it at the Circuit Description section.

FAN5333 use internal lower shunt resistor of \$30\,\mathrm{m}\Omega\$, while FAN5331 use \$50\,\mathrm{m}\Omega\$ . FAN5333A/B use lower internal voltage reference of typical \$0.11\,\mathrm{V}\$ or \$0.31\,\mathrm{V}\$ , while FAN5331 \$1.23\,\mathrm{V}\$ . Although small, may affect your design a little.

The biggest difference in my opinion would be the soft start circuitry of FAN5331 which may affect your PWM output current and voltage. You need to test them both to make sure how they behave in your specific application as the data given in the datasheet are limited.


  FAN5331 Circuit Description
  
  ...
  
  An internal soft start circuitry minimizes in-rush currents. The
  timing of the soft start circuit was chosen to reach 95% of the
  nominal output voltage within maximum 5mS following an enable command
  when VIN = 2.7V, VOUT = 15V, ILOAD = 35mA and COUT (EFFECTIVE) =
  3.2µF.
  
  ...