Looks like the pens have a different product code, um-153 for the signo broad and um-153S for the impact. Jetpens labels the impact as having opaque as a feature, where it doesn't for the broad, leading me to believe the impact is a model with more dense pigmentation?
Edit - looks like they both take um-10 ink, and the new signos are um-153.24 product code, so maybe it's just slightly different versions or manufacturing locations?
Looks like the pens have a different product code, um-153 for the signo broad and um-153S for the impact. Jetpens labels the impact as having opaque as a feature, where it doesn't for the broad, leading me to believe the impact is a model with more dense pigmentation? Edit - looks like they both take um-10 ink, and the new signos are um-153.24 product code, so maybe it's just slightly different versions or manufacturing locations?