Thiel 1.5 vs. 1.6, any experience?

I have owned much of the very best in audio, CJ ART etc., but am in a financial rebuilding phase and starting a modest system.

I owned the Thiel 1.5 at one time and enjoyed them. I am thinking of them for this new small system but would like to learn of any experience you have with them vs. the 1.6 (which I have never heard).

Thanks