What can't you understand?

Call Bob at Ham Radio Outlet in Delaware.
Unless you have $3300 + for a Ten Tec - the only other transceiver you can afford that does it all well is the Kenwood TS 590S....

Most hams wouldn't waste their money on two relatively new rigs at the same time unless they had a unlimited budget or had a problem with the one or the other. And I am not aware of any supplier that would just take the one back - USED and replace it with another new transceiver of a different manufacturer.

Your best bet is to drive to a ham radio store and look at them before you buy them.
My experience came from buying a transceiver sight unseen - by reputation and a recommendation only.

If the TS 590S has only been released here in the USA for one year, there is not going to be a lot written about it other then a glowing report written by the ARRL Labs that was posted in QST Magazine last year....

No one can hold your hand and no one can tell you what to buy.
Regardless of what they tell you - if you look hard enough, with a electron microscope - you will eventually find something wrong with all of them.
The Kenwood is just too new to have problems yet.
There isn't even any updates available for the one I bought last September.