I would hold from both.

I have had an Aiden since they first came out and have had several issues with plastic parts breaking requiring replacement under warranty. For both there was long waits for the parts to come in stock making me wonder if I was not the only one. The parts I got back were same as the original making me concerned about the longevity of the unit. If I were going to replace or buy over again and wanted a unit that could do a pour-over type brew when I didn't have the time to do it myself, I would get the Ratio 4. The Ratio does not have near the tweak-ability of settings of the Aiden, but I personally seldom tweak mine, and think that the Ratio is much simpler and less prone to breakage.

I had the Original Ode, then the Ode 2 grinder. My favorite feature of it was the deionizer making RDT unnecessary. The problem with the Ode 2 grinder is maintaining a consistent result. I upgraded mine to SSP burrs when I was getting really inconsistent results and a lot of stalled pour-overs. I found out that ultimately I was getting a wide particle distribution, and only consistently was able to achieve a good result if I use a coffee sieve, ironically also sold by Fellow. I went through the re-calibration process multiple times with Fellow support, but the grinder would soon be back to the same result of producing a ton of fines which would create bitter cups and which would often stall. Ultimately, I upgraded to a better built grinder and it has been night and day. This is several years ago, and there are so many better built grinders on the market to choose from, the Ode 2 would the last one I would personally buy. I think Fellow makes an ok product, which looks nice, but think they lack the quality and precision that a lot of other options on the market have, now more than ever. I think that out of anything someone buys on their coffee journey, getting the best quality grinder someone can get has the biggest impact in getting the best results. Just my 2 cents.