The Solera name was recently resurrected and applied to a new class C product line that appears to be very little different from Forester and Sunseeker. I have not seen a modern Solera in person, but from the photos it looks just like a Sunseeker LE in construction, quality, and features. Even today’s Forester, once a slightly upscale brand, has been cheapened to be essentially the same product as Sunseeker.
I suspect the Solera product as it is today exists to possibly attract a slightly different crowd by way of some subtle styling differences, or to make it easy for two dealers across the street from each other to sell essentially the same product but claim it is something different.
I would choose based on the proximity and reputation of the dealers that are selling them, and if you might have a preference for particular interior colors or external stickers.
2020 Sunseeker 2440DS on 2019 Ford E-450, Trekker cap, Topaz paint