Is there a technical or logical difference between using an ANSI style join and specifying the join using the WHERE clause? Is there a general preference to either method, or is it solely dependent on your shop’s standards?
No, there is good reason to adopt the new convention. The new syntax separates the join (ON) from the WHERE clause. Apart from taking a little getting used to, this lets you express outer joins that heretofore produced incorrect results! Go with the ANSI standard and lose the old habits.