Yes it may have a higher volume pump but if the the volts are dropping so will your lph's, check the pump for volts i'm interested to see if this may help out at all. AS you can see the lph's rose anywhere from 30-60 on different pumps, even just raising the FP the drop was even more significant.
With this modification you should see 13.8-13.9 volts at the pump with a good charging system. This allows the pump to pull an additional 5 amps at idle. The electrical system is designed to operate at this (14 v) voltage. Denso fuel pumps are designed with this voltage in mind.
As you look these specs over you can see how it is worthless to compare fuel pump flow with out specifying both voltage and pressure. Lph = liters per hour. All Denso 50mm (1G) and 38mm (2G and GVR4) Dia. in-tank fuel pumps start out with the part number 195130-xxxx
T/E/L turbo stock pump, GVR4 and 323GTX too:
$20 used good
(1G and 2G both even though they are different sizes)
part #s: -0510, -0153, -0670, -0440, -2020, -0022, -2760 :
100 lph @43psi @12v
70 lph @58psi @12v
140 lph @43psi @14v
110 lph @58psi @14v