GPD win mini or Steam Deck Oled ?

I am broken between the two. Battery life matters a lot to me and so does utility. I love to have only one device during my travels where I can work and also game. Which means battery life should be good.

I believe by disabling few cores I might be able to get a very dencet battery life out of the GPD win mini 8840u but I am not sure what the number would be. Also performance to power wise I am not sure which is a better option.

Which handled should I get ? Please help me decide.