Welcome to iRV2.
Personally prefer the flat fiberglass side walls , easier to clean and polish.
BTW. It took me about 2 weeks to get comfortable here in the forums . For questions about trailer or 5ers. Go to the " RV Forums " drop box , just under the iRV2 logo at the top of the page, hover with cursor and a drop box will open and you can access the type of RV you want to ask about.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.