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It looks like this (minus the Seadek- it's just white nonskid fiberglass there).
On the 252 and 255 models there are brackets/rails on the inner face of the seatbacks there to mount the backrest for the filler. On the AR250 it's just smooth upholstery.
No regrets so far, but we only just finished the break in period and have about 3 hours on it. Boat looks great though and was put together well. If there were issues from the factory, our dealer straightened them out before we saw it.
Here are some screenahots from Yamaha's promotional video for the 2022 25ft boats. The upper corner gap in the first couple is pretty obvious. It looks like there may be a bottom gap too in the third one.