Substantially better! To ensure even temperature in the bath, water circulation is recommended.
Not to say it wouldn't work at all, but the results won't be as even and I'd avoid doing any cooking close to the min temperature. For example, a rare beef brisket would be cooked at 131 °F for 24-48 hours -- at this temperature, a few degrees lower in one part of the meat could mean food poisoning for you and your guests. I've seen DIYs that incorporated a fish pump, but I take food safety a little too seriously and wouldn't take the risk.