Bear in mind both units will be rather slow. If you need something with better performances you better look somewhere else. Me and others have brought up the lousy performance problem a lot of times. Teltonika keeps on releasing firmwares but never addresses the limited speed all these routers are getting.
Just an example, if you buy a consumer netgear router and attach to it the same antenna you would attach to a teltonika router you will obtain something near 5X troughput speed, both in download and upload.
I have 6 routers from teltonika, 3xRUT955 and 3xRUT240, none of them as ever reached more than 6Mbit download speed. I tested them in a place where there is a very very strong LTE signal.
It is a CAT4 device so it "should" be capable of 150Mbit download speed, i understand those are speeds only achieavable in perfect testing condition but something better than 6Mbit should be achieved even in real life conditions. 6Mbit is 1/25 of what the theoretical limit of the technology is.