Here is a photo of our 2018 2250DS. The ceiling has no apparent texture. The 2106 may look like that due to water damage. You need to personally inspect the trailer before you buy it.
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Ken and Joyce
2017 RAM 1500 Lone Star Quad Cab 5.7 Hemi, 8 speed, 3.21, Tekonsha P3
2018 Winnebago Minnie 2250DS, Haloview MC7108
Yes. Truly bizarre. I have a 2019 MM and it’s smooth for the most part. Definitely do more online and in-person investigating before signing the paperwork. Trust but verify.