Hi AI,
I think this is quite interesting, I have played around with past life/current life charts as well, and I am glad to join in. (Now others know what karmic folks do for fun).
I am not familiar with Forrest's work, so I am not sure what you are looking for. So to start I will use the main karmic markers as I know them, and if I am on the right path, I can keep going. I am going to look at the Moon, Sun, Nodes and Chiron, and inner to outer planet aspects.
Both charts are Sun in Aries of course.
Both charts have either the Moon or Sun conjunct the nodal axis.
Both charts have the same dynamic with the nodes, pairing current life with past life, i.e., Sun with SN, Moon with NN. (This is kind of amusing actually, almost like this soul has had astrology lives and is having a bit of fun.)
Both charts have Sun aspected to outer planets, Nep, Jup, Ura, Pluto.
Both charts have either the Sun or Moon conjunct Venus.
One chart has a MC/IC Cap/Cancer axis, the other chart rotates it so Cap/Cancer is AC/DC.
Chiron is either conjunct the Sun or the NN in the charts.
In one chart 1/7 axis is the largest, in the other this axis is smallest it looks like to me. Good thing, you really wanted to work on that axis in a past life and it looks like you succeeded! (Another amusing reversal).
That is it off the top of my head. You may want to check and see if i am correct, I was doing a quick look.
I am not sure if this is what you are looking for.
If it is and you would like, I can tell you what it all means, but I think you probably already know that!
Let me know what you see, I am interested in the work you are doing and what Forrest has to say about this.
Julia