POD for picture books compared (Book Vault vs KDP vs Ingram spark vs Barnes and Noble)

I tried 4 different print on demand options for my first book, Leafs Library. Here's how they stack up: Quality: 1. Bookvault 2. KDP (Amazon) 3. Ingramspark 4. Barnes and noble Ease of use: 1. KDP (Amazon) 2. Book Vault 3. Barnes and noble 4. Ingram spark. Specific issues: Bookvault: print fine, book listing issues (seems to have failed to list to Ingram or update after first listing). KDP: white bar in the gutter so full page spreads have noticeable white in the middle. Barnes and Noble: very long print time, very light black. Ingram: very light blacks, slow and unhelpful customer service and slow approval. Standout features: Bookvault: Great print quality. thick paper. (at least on the thicker, UK only options). KDP: very fast print times. Upload and order a proof within a couple hours, get proof within a week. Barnes and Noble: Nice looking UI. Ingram: Um, in principle easiest for bookstores to buy from, if you are okay with their subpar printing (even on their ultra premium color, which is what I used!) See more about Leaf’s Library at https://stemforestbooks.com/leafslibrary.html or buy a copy at https://www.etsy.com/listing/1734128266 This video is not sponsored.