That looks like a homebrew. Unfinished edges on the cabinetry, the use of a portable AC instead of Sportsmobiles StarCool system, Residential style light duty curtain rods with what honestly appear to be altered Walmart curtains (NOT a bad thing mind you, just not right for a Sportsmobile). All of these things tell me not a Sportsmobile. From the pics you posted though, it looks like it was fairly well done.
FWIW, there are things about true Sportsmobiles I seriously dislike and I love Sportsmobiles. They do / have been using MDF in their cabinet construction like most other RV manufacturers, although the early ones didn't, The fresh water tank on older models, no idea if the new ones are like this, requires a city water connection to fill the tank, or a funnel in a VERY ackward position... There is no fresh water gravity fill port. I have some repairs I need to do to the MDF cabinetry on mine, like the countertops, and an access panel, and I fully intend to replace with higher quality materials. Maybe if I feel adventurous enough one day, I might just rebuild the cabinets with real wood instead. That would make the build more durable and lighter weight...