Dye sublimation or heat transfer

I think you are comparing apples to oranges and asking which one tastes better. If one likes apples but hates oranges guess what the answer will be. To get started in Dye Sub costs a lot more than inkjet heat transfers. You can order stock heat transfers or have them custom made or buy an inkjet and make your own. IMO it is still an inkjet heat transfer and never look better that a good Dye Sub shirt. Dye Sub transfer paper images donot need trimming so no cutter required. Dye sub needs 100% poly shirts which cost about $6.00 each, inkjet transfers can use cotton shirts which are about $1.90 each. If you plan to sell T shirts for $10.00 to $12.00 then you won't make any money doing Dye Sub. Before you look at processes, understand the customer base and your pricing. Dye Sub is for light shirts only but inkjet heat transfers can be used on black shirts also. I have an Epson 4800 dye sub printer and 16" X 20" heat press so the largest image I can dye sub is 13" X 20". I also have an Epsom 1400 for inkjet transfers so the largest inkjet transfer I can print is 11" X 17". some inkjets only print 8.5" X 11". These are just some of the things to consider. Just my opinion but what you plan to do and how you want to do it will narrow down your choices for you.