If you are planning to ER then it's not an either/or choice - you should be able to max the Roth AND contribute to a 401k.
Well, the OP is debating between a Traditional 401k and a Roth
401k, not a Roth IRA. Limits to the Roth 401k are the same as the Traditional 401k. But yeah, whet the heck, max the Roth IRA too, and then that makes the decision easier to do a Traditional 401k, as a hedge against the unknowable future government tax policy.
The upshot in my mind is that if future government tax policy is the
only thing that would make one option mathematically better than the other, then pick one with the flip of a coin and don't worry about it, since it's a waste of time and energy to worry about stuff you can't control or predict.
I'm not sure I understand the relationship inflation has to this decision though...