Personally, I'm for reliability and dealer support.
My dad got by for years with a 20 year old Ford that he got 4th hand and pretty sure it only had oil changes and a spraygun overhaul.
There was nothing flashy on it, the only electrics were the starter and headlights, but it started when you needed it to, was easy to service and get parts for.
Most of the tractors where I grew up were the same, 40hp MF, Fiat or Fords that had been pushed hard for years, all the lights and mirrors had long fallen or been ripped off, but the core tractor kept plodding along.
Subcompact and most compact tractors aren't sold to farms that you want to make a living off (not in the west anyway, if they are, you could count them on a blind butchers left hand), they are sold to home owners that want to play at being farmer (guilty as charged).
They want reliability, but aren't going to starve if it breaks down.
As its pretty much a discretionary purchase (Its a toy, you can justify it how you want), the main selling point on this segment is either a brand name or features.
As a new company trying to get into the game, you don't have 40+ years to build a name, so you have to go with features to differentiate yourself from everyone else and make it look like better value until you get a name. It worked with Japanese new cars in the 70's and 80's, Korean in the 90's and the Chinese are trying it now. Car turnover is a lot quicker than tractors though, so they will need to play the long game to get the name and reputation out there. In their favour is social media and youtube, so wait for a few small farm shows to get a new Summit tractor in the pole barn in the near future.
Good luck to them, hopefully they will support their product, sell good attachments and make the big companies have to sharpen their pencils to be more competitive and give us a better deal. Where I am there are too many 2nd hand chinese tractors that people bought cheap, but now can't get parts for, or even give away, as they are junk and no one wants them. As a result the main 4 dealers pretty much charge what they want as where else are you going to get a good tractor and dealer parts?