i would pick the Thor, based simply on the fact of it being 5 years newer.
the 1999 would be only the second year of hybrids ever being made and a lot of improvements came along between then and 2003.
without pics or model #'s, it's hard to suggest if the table could be modded.
but the main thing would be checking the WHOLE trailer for leaks/soft spots, especially around the bunk ends. that includes looking under the bunk door hinges and the doors for delamination.
Dan- Firefighter, Retired:C, Shawn- Musician/Entrepreneur:W, Zoe- Faithful Golden Retriever(RIP:(), 2014 Ford F150 3.5 EcoboostMax Tow pkg, 2016 PrimeTime TracerAIR 255 w/4pt Equalizer and 5 Mtn. bikes and 2 Road bikes