What did you assume for in line resistance and which TS params did you assume? No way either program is this far apart unless the driver or design assumptions differ. I listed mine in my previous post. How did your assumptions differ?
I pulled the T/S params from the Purifi website recently. Pretty sure they are the same as your posted v1.10, but IME, never hurts for another set of eyes to review as I added the driver manually...
For inline resistance, here are the assumptions...
Here are the box settings...
NOTE: Bassbox does not allow you to manipulate Vb and Qtc independently. Here I chose to match your Vb, if I set Qtc instead, it lowers Vb to about 3.9 liters and f3 becomes 96 Hz.
This was done with the damping set to Heavy. This corresponds to a Qa of 5.
Full output of sim is attached.