Thiel 2.3 vs 2.4

I have 3.5's and love the deep bass.
I am tempted though to go with a newer and more modern speaker.
Im seeing some good deals on the 2.3's and Im wondering how much of a difference there is between the 2.3's and 2.4's
I have heard the 2.4's at Thiel and they are an incredible speaker!
I have become a devoted Thiel fan so please no other speaker recommendations.
My main concern is losing the deep bass of the 3.5's.
I understand the 2.3's only go down to 36hz or so.
Thanks in advance!