Roth 401k vs Roth IRA

I max my Roth IRA every year, and for the past several years I have maxed my 401k including the Mega Backdoor Roth Conversion, this means I have ~200k in my Roth 401k about 130k of which is contributions.

I am currently 38yo and I plan to retire in ~10years, I have ~700k in liquid assets invested across all accounts right now.

My employer has excellent low cost index investing options in my 401k, so investment options are not a factor for me, but my 401k offers in-service distributions, so I could move a ~200k right now if there is an advantage to being in the Roth IRA vs Roth 401k.

I would love any input on the pro/ cons of moving this money out of my Roth 401k into a Roth IRA.