You are missing quite a few brushes from those collections before they can be considered complete.enjoy Both my Kents and Simpsons!
Kents tend to be softer, fluffier, more luxurious, little more loft, more adept to creams.
Simpsons are benchmark 'standard', little more backbone, adept to either soap or cream, come in great range of sizes/styles.
Handles for both are Excellent, IMHO!
Knot/hair quality for both are Excellent, IMHO!
Cannot go wrong with either!!
On a serious note, which size handle of the Kents do you find most comfortable? XL, L, or M?