[f-nsp] Difference between modules with and without -A (ironcore)

[gstammw at gmx.net]

Dear colleagues,

I've taken a look at some ironcore-modules for a bigiron and found out that
there seem to be the same types of modules with and without an -A in the
part-number. What's the difference between them? Someone told me that the
modules with -A have a faster bus speed but I don't know what's the real
impact of the bus speed. Will the bigiron switch faster or something like
that or is layer3-forwarding being accelerated?

Thanks for your feedback in advance,
Gunther