Question about 3DR SIK radio (900mhz)

Hardware Radios
1

I’ve done some configuring like changing the baud rates and also changing the channel.

I noticed on the screen that my land based radio (the one I hook to the PC) is on firmware 1.9, but my vehicle based radio is on firmware 1.7.

Is that an issue? Should I match them?

Thanks.

2

I had a pair like that on a multirotor for months with no consequence that I could detect. I had the FTDI adapter out one day for something else and finally updated it. No change either way.