Sailun S637 or Goodyear G614

I had trouble with 16" load range E and load range F tires on my fiver and ended up going to the 17.5" because I didn't want to buy the G614 and find out it didn't work. I still read all the tire threads (painful as that is sometimes) and I talk to other trailer users because I'm still curious. I was on the job site and saw that a crew with a large vacuum unit on a trailer had the G614 on it so I asked how they liked them. The driver said they tried all brands of tires on the unit and got sick of the downtime because of blowouts so they spent "about $400 a tire" and put the G614s on. No more blowouts. They then put the same tires on the tool trailer. Same result. Maybe I could have saved a few bucks and got the G614s. Maybe..
Brian