As a Trillium
owner myself, I’d go for the Trillium
. IMHO it’s smart to take a toilet off your list as space is limited in a 13 ft trailer. Realize on FG trailers length is measured end to end. So a 13 foot trailer has just a 10ft body on it. To get a toilet you give up a place to sit.
As you get larger the bathroom trade off is easier. Our 19 footer has a toilet and shower, a queen bed and a four person dinette. Meanwhile my Trillium 1300 has a smallish rear dinette that I keep as a bed and a front gaucho that coverts to bunks. So I use the gaucho as a place to sit/read/computer/whatever and leave the rear dinette in bed form.
Good luck on the hunt!