The AeroPress uses ‘immersion method’ brewing, and the Delter Coffee Press uses ‘injection method’ brewing.
Immersion means less control and more likelihood of bitter coffee.
Injection means more control and less likelihood of bitter coffee.
AeroPress has a set volume of approximately 220ml. There is no workaround to this if you want to make larger batches of coffee or a serving for 2 or more people. With the Delter, you can easily brew a batch of 400ml. This is due to the jet-seal design that keeps coffee and water separated, you can simply refill the brew chamber for a larger batch.
Both are very simple to clean.
Delter Coffee Press is about 5 seconds longer than Aeropress to clean.
AeroPress has that annoying ‘grit’ in the bottom of the cup, which is due to the bypass design. The Delter has an o-ring seal that creates a ‘non-bypass’ filter effect, and the filtering is much more akin to a V60 pour-over, this is basically as clean as filtering your coffee can get.
The AeroPress with current materials used being polypropylene. Not possible to have a clear chamber, but the build is solid.
Delter Coffee Press uses Tritan Copolyester, which is clear and looks like glass. It’s also indestructible.
Both are portable.
Delter Coffee Press probably slightly more portable, as you can grind your coffee and screw on the cap before you go, once at your destination, just add hot water.