Undercut/lifter: modeling tool or stamps?

[jujulolo]

I would like to “lift” some of my carving.

I saw that there is a “pen – type” modeling tool for that (craftool 8039-05), and there are also stamps: undercut beveler / lifter (craftool 6892 and 6060).

There are several videos that show how to use the undercut modeling tool but I don’t see the advantage against the stamps, since you can use the stamp as a pen but you can’t hit the modeling tool with a maul.

The size of the two stamps are roughly the same as the two sides of the modeling tool and the price of the two stamps is slightly lower that the modeling tool.

So, what am I missing?

Thanks for your help !