Personnaly i went with the pocket 5 , mainly because of the form factor. From the raw Power perspective , yes the Odin 2 is more Powerfull but there is not much difference between what the Odin 2 can run and the pocket 5 can’t. With some tinkering you can run a fair amount of switch game and with the new update on cemu, the pocket 5 can Also run a lot of game without issue. Also the company behind the pocket 5 just release a screen that you can attach to the pocket 5 basicly transforming it in a ds/3ds.
Good luck with your choice .