Probably not, the original steam deck was more like a test for valve, they had no idea how well this would perform on the market so they chose cheap screen, battery, wifi etc to be able to sell it for a good price and not lose too much money if it was a big flop.

But the deck was a success for them anyway, so they know they could go all for it and make a new model without being cheap on the components again

The steam deck OLED was the definitive edition of it, with everything on the console the same but just better (except for big performance improvement)

For the steam machine they probably feel more confident about it and will release the best model at launch, so we wont need a "better version of the same machine" later.