I would not use either syntax. Your query indicates an inner join, I would use the explicit syntax for that. You should not be using implied joins ever, they are subject to misinterpretation (was that an accidental cross join or did you mean to do that?) and accidental cross joins. Would you use C# code that was replaced 18 years agao with a better syntax (well actually C# didn't exist 18 years ago, but I think you understand what I'm saying)? Then why are you using outdated SQL code?
Not only is the implied join a problem for maintenance but it can be a big problem if you try to use the implied join syntax for outer joins as that does not work correctly in some databases and is also deprecated in at least one database, SQL Server, I know. And if you have the need for a filter on the table in the left join, you can't do that with the implied syntax at all becasue it will convert it to an innner join.
Yes your code works but it is a poor technique and you should get used to using the inner join explicitly, so that you are making your intent clear to furture maintainers and so you don't create accidental problems as you write more complex queries. If using the explicit syntax is not second nature for you, you will really struggle when you need to use if for something more complicated.
I have never in 30 years of querying databases seen a need to write a natural join and had to look up what one was, so using that is not more clear than the implied join.
