Company Roth 401(k) & Traditional 401 (k)

Investing
#1

Hello,

Understanding that the dollar contribution limit of company sponsored accounts is $20,500 total; is there a limit of between Roth 401 (k) and Traditional 401 (k) of this $20,500 total?

for example: only $6,000 for Roth (k) limit then contribute $14,500 to Traditional 401 (k)?
Or, should I prefer, all $20,500 could be invested in the company sponsored Roth 401 (k)?

I’m unclear on how to spilt the $$ into the 401 (k)'s.

#2

Total is $20,500.
Roth 401(k) + 401(k) total limit. Also $20,500 is individual contribution limit. That’s not including employer matches.

IRA limit is $6,000. Between Roth & Traditional.

Different accounts. Limits are combined totals.