I knew a guy on another forum who had one of those fans, and he loved it. No complaints that I remember; although he was in a woke part of the world and didn't need stealth. Just reliable ventilation.
In general, I think the rule is that you want something that can exchange all your air once per minute. You have shy of 54 ft^3, so 190cfm is going to do you fine and you will be able to run it on a lower setting. However, if you're going to use the filter (versus just pushing the air outside), you should add about 10% onto that since it will detract from your fan's ability to move air.
Even then, the unit is still a good size for you. Just know that your fan will need to run a setting or two higher than normal to account for it. If fan noise is an issue (i.e. your bedroom tent is in a closet and you want to stay stealth), you might want to look into Db output on that one. A lot of the reviews indicate it's super quiet, but in my experience more quiet = more money.
As an aside: I have one of the Vivosun 6" filters, and the thing is a champ. Not to knock the more expensive offerings out there, but using that one the way they instructed has led to zero issues for me at 1/4 the cost of a Phresh filter. I let the exhaust 'pull' through it and keep the provided filter sleeve on the outside. No one in the house has any idea, and I haven't encountered any of the crazy issues some of those reviews call out.
