It doesn't take long for all the RV's to start looking alike, and you'll forget which ones you liked.
Make up a score sheet with things you are looking for. Some of those thing may be floor plan, floor space, counter space, storage, insulation, tank heat, slide outs, beds (layout/size), trailer size / weight, etc. Maybe, even look at distance to nearest dealer (that's where you'll pick up your unit, and get any after sale support".
As you are going through each unit, do a score sheet, and make notes on anything that stands out. There may be items that have different importance to you and your significant other.
We found it beneficial to each do a sheet. We added up the scores and threw out all but the top five units. Then we went back and did a second look at only those five.