401k vs Roth 401k

I’ve been reading up on these two retirement plans a bit. Just wondering what the Blind community does (and why). Got a couple of questions:

1. What is my “income bracket” when I retire? Is it based on how much I will be getting from Social Security and my personal retirement funds?
2. For me, and maybe a lot of other SWE, which plan should we choose? If we assume that our TC will be increasing every year, does that mean we should be doing Roth 401k (tax now rather than later)?
3. Feel free to share what your plan is.

If anyone can provide concrete examples (with numbers) that’d be super helpful.

#personalfinance #investments #retirement #401k