yes I agree the primary inductance is much more in the forward converter than the flyback...but this is always the case....As you know, forward converters always have bigger primary inductances (than the same smps done with a flyback)_ because they tend not to use gapped cores, and also, the primary inductance must be large in order to keep the magnetising current down. In a flyback, magnetising current is the be all and end all....in a forward converter, magnetising current is not actually wanted at all.
I mean, you rightly say that the forward is more affected by leakage than the flyback, and that this is because the forward has a higher primary inductance.....but I don't see it in the design guidelines of forward converters, saying to make their primary inductances as small as possible in order to reduce the problem shown here of high leakage inductance?
So can we make the formal declaration here, that "forward converters are more detrimentally affected by leakage inductance than flyback converters?"