Someone reading this thread who doesn’t have to take lots of stuff on location will probably think we’re crazy to get into this topic so intensely — but that’s because they haven’t had to carry lots of stuff!
Both are the same size. Actually, mine looks more like the R12NF, which is more rugged, but I paid less than $150 at ATS Comms, in 2005. (But I got the inflatable tires, which were cheaper.) I don’t like the looks of the big tire on the cheaper one – could get hung up on obstacles. Don’t know where you are, but I found ATSComms very good to deal with, near Washington, DC. One-man shop, only sells what he uses in production, good prices.
No matter what you get, you’ll be glad you did. Don’t forget that the cart itself takes up space in your car, and it should always be the last thing you load, so that you can take it out first and load up.