Question on Soundsmith carts

I have been looking at some sound smith carts, and was wondering if the mkii vs original are that different.

I am seeing I can get the zephyr non mkii for about 1k versus the mkii for 2k or an older voice for like 1600.

is it better to go with a higher cart and older generation or newer generation and lower cart.

I see a new zephyr or older voice or older zephyr star mimic.

thanks for the input,  k